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-rw-r--r--src/Collision.cpp1629
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diff --git a/src/Collision.cpp b/src/Collision.cpp
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index 00000000..14b3adcd
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+++ b/src/Collision.cpp
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+#include "common.h"
+#include "patcher.h"
+#include "Game.h"
+#include "General.h"
+#include "RenderBuffer.h"
+#include "SurfaceTable.h"
+#include "Collision.h"
+
+enum Direction
+{
+ DIR_X_POS,
+ DIR_X_NEG,
+ DIR_Y_POS,
+ DIR_Y_NEG,
+ DIR_Z_POS,
+ DIR_Z_NEG,
+};
+
+eLevelName &CCollision::ms_collisionInMemory = *(eLevelName*)0x8F6250;
+CLinkList<CColModel*> &CCollision::ms_colModelCache = *(CLinkList<CColModel*>*)0x95CB58;
+
+#if 0
+
+void
+CCollision::Init(void)
+{
+ ms_colModelCache.Init(NUMCOLCACHELINKS);
+ ms_collisionInMemory = LEVEL_NONE;
+}
+
+void
+CCollision::Update(void)
+{
+ CVector pos = FindPlayerCoors();
+ eLevelName level = CTheZones::m_CurrLevel;
+ bool changeLevel = false;
+
+ // hardcode a level if there are no zones
+ if(level == LEVEL_NONE){
+ if(CGame::currLevel == LEVEL_INDUSTRIAL &&
+ pos.x < 400.0f){
+ level = LEVEL_COMMERCIAL;
+ changeLevel = true;
+ }else if(CGame::currLevel == LEVEL_SUBURBAN &&
+ pos.x > -450.0f && pos.y < -1400.0f){
+ level = LEVEL_COMMERCIAL;
+ changeLevel = true;
+ }else{
+ if(pos.x > 800.0f){
+ level = LEVEL_INDUSTRIAL;
+ changeLevel = true;
+ }else if(pos.x < -800.0f){
+ level = LEVEL_SUBURBAN;
+ changeLevel = true;
+ }
+ }
+ }
+ if(level != LEVEL_NONE && level != CGame::currLevel){
+ debug("changing level %d -> %d\n", CGame::currLevel, level);
+ CGame::currLevel = level;
+ }
+ if(ms_collisionInMemory != CGame::currLevel)
+ LoadCollisionWhenINeedIt(changeLevel);
+ CStreaming::HaveAllBigBuildingsLoaded(CGame::currLevel);
+}
+
+void
+CCollision::LoadCollisionWhenINeedIt(bool changeLevel)
+{
+ eLevelName level;
+ level = LEVEL_NONE;
+ if(!changeLevel){
+ //assert(0 && "unimplemented");
+ }
+
+ if(level != CGame::currLevel || changeLevel){
+ CTimer::Stop();
+ CStreaming::RemoveIslandsNotUsed(LEVEL_INDUSTRIAL);
+ CStreaming::RemoveIslandsNotUsed(LEVEL_COMMERCIAL);
+ CStreaming::RemoveIslandsNotUsed(LEVEL_SUBURBAN);
+ CStreaming::RemoveBigBuildings(LEVEL_INDUSTRIAL);
+ CStreaming::RemoveBigBuildings(LEVEL_COMMERCIAL);
+ CStreaming::RemoveBigBuildings(LEVEL_SUBURBAN);
+ ms_collisionInMemory = CGame::currLevel;
+ CStreaming::RemoveUnusedBigBuildings(CGame::currLevel);
+ CStreaming::RemoveUnusedBuildings(CGame::currLevel);
+ CStreaming::RequestBigBuildings(CGame::currLevel);
+ CStreaming::LoadAllRequestedModels();
+ CStreaming::HaveAllBigBuildingsLoaded(CGame::currLevel);
+ CTimer::Update();
+ }
+}
+
+#endif
+
+//
+// Test
+//
+
+
+bool
+CCollision::TestSphereSphere(const CColSphere &s1, const CColSphere &s2)
+{
+ float d = s1.radius + s2.radius;
+ return (s1.center - s2.center).MagnitudeSqr() < d*d;
+}
+
+bool
+CCollision::TestSphereBox(const CColSphere &sph, const CColBox &box)
+{
+ if(sph.center.x + sph.radius < box.min.x) return false;
+ if(sph.center.x - sph.radius > box.max.x) return false;
+ if(sph.center.y + sph.radius < box.min.y) return false;
+ if(sph.center.y - sph.radius > box.max.y) return false;
+ if(sph.center.z + sph.radius < box.min.z) return false;
+ if(sph.center.z - sph.radius > box.max.z) return false;
+ return true;
+}
+
+bool
+CCollision::TestLineBox(const CColLine &line, const CColBox &box)
+{
+ float t, x, y, z;
+ // If either line point is in the box, we have a collision
+ if(line.p0.x > box.min.x && line.p0.x < box.max.x &&
+ line.p0.y > box.min.y && line.p0.y < box.max.y &&
+ line.p0.z > box.min.z && line.p0.z < box.max.z)
+ return true;
+ if(line.p1.x > box.min.x && line.p1.x < box.max.x &&
+ line.p1.y > box.min.y && line.p1.y < box.max.y &&
+ line.p1.z > box.min.z && line.p1.z < box.max.z)
+ return true;
+
+ // check if points are on opposite sides of min x plane
+ if((box.min.x - line.p1.x) * (box.min.x - line.p0.x) < 0.0f){
+ // parameter along line where we intersect
+ t = (box.min.x - line.p0.x) / (line.p1.x - line.p0.x);
+ // y of intersection
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y){
+ // z of intersection
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ return true;
+ }
+ }
+
+ // same test with max x plane
+ if((line.p1.x - box.max.x) * (line.p0.x - box.max.x) < 0.0f){
+ t = (line.p0.x - box.max.x) / (line.p0.x - line.p1.x);
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y){
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ return true;
+ }
+ }
+
+ // min y plne
+ if((box.min.y - line.p0.y) * (box.min.y - line.p1.y) < 0.0f){
+ t = (box.min.y - line.p0.y) / (line.p1.y - line.p0.y);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ return true;
+ }
+ }
+
+ // max y plane
+ if((line.p0.y - box.max.y) * (line.p1.y - box.max.y) < 0.0f){
+ t = (line.p0.y - box.max.y) / (line.p0.y - line.p1.y);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ return true;
+ }
+ }
+
+ // min z plne
+ if((box.min.z - line.p0.z) * (box.min.z - line.p1.z) < 0.0f){
+ t = (box.min.z - line.p0.z) / (line.p1.z - line.p0.z);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y)
+ return true;
+ }
+ }
+
+ // max z plane
+ if((line.p0.z - box.max.z) * (line.p1.z - box.max.z) < 0.0f){
+ t = (line.p0.z - box.max.z) / (line.p0.z - line.p1.z);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y)
+ return true;
+ }
+ }
+ return false;
+}
+
+bool
+CCollision::TestVerticalLineBox(const CColLine &line, const CColBox &box)
+{
+ if(line.p0.x <= box.min.x) return false;
+ if(line.p0.y <= box.min.y) return false;
+ if(line.p0.x >= box.max.x) return false;
+ if(line.p0.y >= box.max.y) return false;
+ if(line.p0.z < line.p1.z){
+ if(line.p0.z > box.max.z) return false;
+ if(line.p1.z < box.min.z) return false;
+ }else{
+ if(line.p1.z > box.max.z) return false;
+ if(line.p0.z < box.min.z) return false;
+ }
+ return true;
+}
+
+bool
+CCollision::TestLineTriangle(const CColLine &line, const CVector *verts, const CColTriangle &tri, const CColTrianglePlane &plane)
+{
+ float t;
+ CVector normal;
+ plane.GetNormal(normal);
+
+ // if points are on the same side, no collision
+ if(plane.CalcPoint(line.p0) * plane.CalcPoint(line.p1) > 0.0f)
+ return false;
+
+ // intersection parameter on line
+ t = -plane.CalcPoint(line.p0) / DotProduct(line.p1 - line.p0, normal);
+ // find point of intersection
+ CVector p = line.p0 + (line.p1-line.p0)*t;
+
+ const CVector &va = verts[tri.a];
+ const CVector &vb = verts[tri.b];
+ const CVector &vc = verts[tri.c];
+ CVector2D vec1, vec2, vec3, vect;
+
+ // We do the test in 2D. With the plane direction we
+ // can figure out how to project the vectors.
+ // normal = (c-a) x (b-a)
+ switch(plane.dir){
+ case DIR_X_POS:
+ vec1.x = va.y; vec1.y = va.z;
+ vec2.x = vc.y; vec2.y = vc.z;
+ vec3.x = vb.y; vec3.y = vb.z;
+ vect.x = p.y; vect.y = p.z;
+ break;
+ case DIR_X_NEG:
+ vec1.x = va.y; vec1.y = va.z;
+ vec2.x = vb.y; vec2.y = vb.z;
+ vec3.x = vc.y; vec3.y = vc.z;
+ vect.x = p.y; vect.y = p.z;
+ break;
+ case DIR_Y_POS:
+ vec1.x = va.z; vec1.y = va.x;
+ vec2.x = vc.z; vec2.y = vc.x;
+ vec3.x = vb.z; vec3.y = vb.x;
+ vect.x = p.z; vect.y = p.x;
+ break;
+ case DIR_Y_NEG:
+ vec1.x = va.z; vec1.y = va.x;
+ vec2.x = vb.z; vec2.y = vb.x;
+ vec3.x = vc.z; vec3.y = vc.x;
+ vect.x = p.z; vect.y = p.x;
+ break;
+ case DIR_Z_POS:
+ vec1.x = va.x; vec1.y = va.y;
+ vec2.x = vc.x; vec2.y = vc.y;
+ vec3.x = vb.x; vec3.y = vb.y;
+ vect.x = p.x; vect.y = p.y;
+ break;
+ case DIR_Z_NEG:
+ vec1.x = va.x; vec1.y = va.y;
+ vec2.x = vb.x; vec2.y = vb.y;
+ vec3.x = vc.x; vec3.y = vc.y;
+ vect.x = p.x; vect.y = p.y;
+ break;
+ default:
+ assert(0);
+ }
+ // This is our triangle:
+ // 3-------2
+ // \ P /
+ // \ /
+ // \ /
+ // 1
+ // We can use the "2d cross product" to check on which side
+ // a vector is of another. Test is true if point is inside of all edges.
+ if(CrossProduct2D(vec2-vec1, vect-vec1) < 0.0f) return false;
+ if(CrossProduct2D(vec3-vec1, vect-vec1) > 0.0f) return false;
+ if(CrossProduct2D(vec3-vec2, vect-vec2) < 0.0f) return false;
+ return true;
+}
+
+// Test if line segment intersects with sphere.
+// If the first point is inside the sphere this test does not register a collision!
+// The code is reversed from the original code and rather ugly, see Process for a clear version.
+// TODO: actually rewrite this mess
+bool
+CCollision::TestLineSphere(const CColLine &line, const CColSphere &sph)
+{
+ CVector v01 = line.p1 - line.p0; // vector from p0 to p1
+ CVector v0c = sph.center - line.p0; // vector from p0 to center
+ float linesq = v01.MagnitudeSqr();
+ // I leave in the strange -2 factors even though they serve no real purpose
+ float projline = -2.0f * DotProduct(v01, v0c); // project v0c onto line
+ // Square of tangent from p0 multiplied by line length so we can compare with projline.
+ // The length of the tangent would be this: sqrt((c-p0)^2 - r^2).
+ // Negative if p0 is inside the sphere! This breaks the test!
+ float tansq = 4.0f * linesq *
+ (sph.center.MagnitudeSqr() - 2.0f*DotProduct(sph.center, line.p0) + line.p0.MagnitudeSqr() - sph.radius*sph.radius);
+ float diffsq = projline*projline - tansq;
+ // if diffsq < 0 that means the line is a passant, so no intersection
+ if(diffsq < 0.0f)
+ return false;
+ // projline (negative in GTA for some reason) is the point on the line
+ // in the middle of the two intersection points (startin from p0).
+ // sqrt(diffsq) somehow works out to be the distance from that
+ // midpoint to the intersection points.
+ // So subtract that and get rid of the awkward scaling:
+ float f = (-projline - sqrt(diffsq)) / (2.0f*linesq);
+ // f should now be in range [0, 1] for [p0, p1]
+ return f >= 0.0f && f <= 1.0f;
+}
+
+bool
+CCollision::TestSphereTriangle(const CColSphere &sphere,
+ const CVector *verts, const CColTriangle &tri, const CColTrianglePlane &plane)
+{
+ // If sphere and plane don't intersect, no collision
+ if(fabs(plane.CalcPoint(sphere.center)) > sphere.radius)
+ return false;
+
+ const CVector &va = verts[tri.a];
+ const CVector &vb = verts[tri.b];
+ const CVector &vc = verts[tri.c];
+
+ // calculate two orthogonal basis vectors for the triangle
+ CVector vec2 = vb - va;
+ float len = vec2.Magnitude();
+ vec2 = vec2 * (1.0f/len);
+ CVector vec1 = CrossProduct(vec2, plane.normal);
+
+ // We know A has local coordinate [0,0] and B has [0,len].
+ // Now calculate coordinates on triangle for these two vectors:
+ CVector vac = vc - va;
+ CVector vas = sphere.center - va;
+ CVector2D b(0.0f, len);
+ CVector2D c(DotProduct(vec1, vac), DotProduct(vec2, vac));
+ CVector2D s(DotProduct(vec1, vas), DotProduct(vec2, vas));
+
+ // The three triangle lines partition the space into 6 sectors,
+ // find out in which the center lies.
+ int insideAB = CrossProduct2D(s, b) >= 0.0f;
+ int insideAC = CrossProduct2D(c, s) >= 0.0f;
+ int insideBC = CrossProduct2D(s-b, c-b) >= 0.0f;
+
+ int testcase = insideAB + insideAC + insideBC;
+ float dist = 0.0f;
+ if(testcase == 1){
+ // closest to a vertex
+ if(insideAB) dist = (sphere.center - vc).Magnitude();
+ else if(insideAC) dist = (sphere.center - vb).Magnitude();
+ else if(insideBC) dist = (sphere.center - va).Magnitude();
+ else assert(0);
+ }else if(testcase == 2){
+ // closest to an edge
+ if(!insideAB) dist = DistToLine(&va, &vb, &sphere.center);
+ else if(!insideAC) dist = DistToLine(&va, &vc, &sphere.center);
+ else if(!insideBC) dist = DistToLine(&vb, &vc, &sphere.center);
+ else assert(0);
+ }else if(testcase == 3){
+ // center is in triangle
+ return true;
+ }else
+ assert(0); // front fell off
+
+ return dist < sphere.radius;
+}
+
+bool
+CCollision::TestLineOfSight(CColLine &line, const CMatrix &matrix, CColModel &model, bool ignoreSurf78)
+{
+ static CMatrix matTransform;
+ int i;
+
+ // transform line to model space
+ Invert(matrix, matTransform);
+ CColLine newline(matTransform * line.p0, matTransform * line.p1);
+
+ // If we don't intersect with the bounding box, no chance on the rest
+ if(!TestLineBox(newline, model.boundingBox))
+ return false;
+
+ for(i = 0; i < model.numSpheres; i++)
+ if(!ignoreSurf78 || model.spheres[i].surface != 7 && model.spheres[i].surface != 8)
+ if(TestLineSphere(newline, model.spheres[i]))
+ return true;
+
+ for(i = 0; i < model.numBoxes; i++)
+ if(!ignoreSurf78 || model.boxes[i].surface != 7 && model.boxes[i].surface != 8)
+ if(TestLineBox(newline, model.boxes[i]))
+ return true;
+
+ CalculateTrianglePlanes(&model);
+ for(i = 0; i < model.numTriangles; i++)
+ if(!ignoreSurf78 || model.triangles[i].surface != 7 && model.triangles[i].surface != 8)
+ if(TestLineTriangle(newline, model.vertices, model.triangles[i], model.trianglePlanes[i]))
+ return true;
+
+ return false;
+}
+
+
+//
+// Process
+//
+
+// For Spheres mindist is the squared distance to its center
+// For Lines mindist is between [0,1]
+
+bool
+CCollision::ProcessSphereSphere(const CColSphere &s1, const CColSphere &s2, CColPoint &point, float &mindistsq)
+{
+ CVector dist = s1.center - s2.center;
+ float d = dist.Magnitude() - s2.radius; // distance from s1's center to s2
+ float dc = d < 0.0f ? 0.0f : d; // clamp to zero, i.e. if s1's center is inside s2
+ // no collision if sphere is not close enough
+ if(mindistsq <= dc*dc || s1.radius <= dc)
+ return false;
+ dist.Normalise();
+ point.point = s1.center - dist*dc;
+ point.normal = dist;
+ point.surfaceA = s1.surface;
+ point.pieceA = s1.piece;
+ point.surfaceB = s2.surface;
+ point.pieceB = s2.piece;
+ point.depth = s1.radius - d; // sphere overlap
+ mindistsq = dc*dc; // collision radius
+ return true;
+}
+
+bool
+CCollision::ProcessSphereBox(const CColSphere &sph, const CColBox &box, CColPoint &point, float &mindistsq)
+{
+ CVector p;
+ CVector dist;
+
+ // GTA's code is too complicated, uses a huge 3x3x3 if statement
+ // we can simplify the structure a lot
+
+ // first make sure we have a collision at all
+ if(sph.center.x + sph.radius < box.min.x) return false;
+ if(sph.center.x - sph.radius > box.max.x) return false;
+ if(sph.center.y + sph.radius < box.min.y) return false;
+ if(sph.center.y - sph.radius > box.max.y) return false;
+ if(sph.center.z + sph.radius < box.min.z) return false;
+ if(sph.center.z - sph.radius > box.max.z) return false;
+
+ // Now find out where the sphere center lies in relation to all the sides
+ int xpos = sph.center.x < box.min.x ? 1 :
+ sph.center.x > box.max.x ? 2 :
+ 0;
+ int ypos = sph.center.y < box.min.y ? 1 :
+ sph.center.y > box.max.y ? 2 :
+ 0;
+ int zpos = sph.center.z < box.min.z ? 1 :
+ sph.center.z > box.max.z ? 2 :
+ 0;
+
+ if(xpos == 0 && ypos == 0 && zpos == 0){
+ // sphere is inside the box
+ p = (box.min + box.max)*0.5f;
+
+ dist = sph.center - p;
+ float lensq = dist.MagnitudeSqr();
+ if(lensq < mindistsq){
+ point.normal = dist * (1.0f/sqrt(lensq));
+ point.point = sph.center - point.normal;
+ point.surfaceA = sph.surface;
+ point.pieceA = sph.piece;
+ point.surfaceB = box.surface;
+ point.pieceB = box.piece;
+
+ // find absolute distance to the closer side in each dimension
+ float dx = dist.x > 0.0f ?
+ box.max.x - sph.center.x :
+ sph.center.x - box.min.x;
+ float dy = dist.y > 0.0f ?
+ box.max.y - sph.center.y :
+ sph.center.y - box.min.y;
+ float dz = dist.z > 0.0f ?
+ box.max.z - sph.center.z :
+ sph.center.z - box.min.z;
+ // collision depth is maximum of that:
+ if(dx > dy && dx > dz)
+ point.depth = dx;
+ else if(dy > dz)
+ point.depth = dy;
+ else
+ point.depth = dz;
+ return true;
+ }
+ }else{
+ // sphere is outside.
+ // closest point on box:
+ p.x = xpos == 1 ? box.min.x :
+ xpos == 2 ? box.max.x :
+ sph.center.x;
+ p.y = ypos == 1 ? box.min.y :
+ ypos == 2 ? box.max.y :
+ sph.center.y;
+ p.z = zpos == 1 ? box.min.z :
+ zpos == 2 ? box.max.z :
+ sph.center.z;
+
+ dist = sph.center - p;
+ float lensq = dist.MagnitudeSqr();
+ if(lensq < mindistsq){
+ float len = sqrt(lensq);
+ point.point = p;
+ point.normal = dist * (1.0f/len);
+ point.surfaceA = sph.surface;
+ point.pieceA = sph.piece;
+ point.surfaceB = box.surface;
+ point.pieceB = box.piece;
+ point.depth = sph.radius - len;
+ mindistsq = lensq;
+ return true;
+ }
+ }
+ return false;
+}
+
+bool
+CCollision::ProcessLineBox(const CColLine &line, const CColBox &box, CColPoint &point, float &mindist)
+{
+ float mint, t, x, y, z;
+ CVector normal;
+ CVector p;
+
+ mint = 1.0f;
+ // check if points are on opposite sides of min x plane
+ if((box.min.x - line.p1.x) * (box.min.x - line.p0.x) < 0.0f){
+ // parameter along line where we intersect
+ t = (box.min.x - line.p0.x) / (line.p1.x - line.p0.x);
+ // y of intersection
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y){
+ // z of intersection
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ if(t < mint){
+ mint = t;
+ p = CVector(box.min.x, y, z);
+ normal = CVector(-1.0f, 0.0f, 0.0f);
+ }
+ }
+ }
+
+ // max x plane
+ if((line.p1.x - box.max.x) * (line.p0.x - box.max.x) < 0.0f){
+ t = (line.p0.x - box.max.x) / (line.p0.x - line.p1.x);
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y){
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ if(t < mint){
+ mint = t;
+ p = CVector(box.max.x, y, z);
+ normal = CVector(1.0f, 0.0f, 0.0f);
+ }
+ }
+ }
+
+ // min y plne
+ if((box.min.y - line.p0.y) * (box.min.y - line.p1.y) < 0.0f){
+ t = (box.min.y - line.p0.y) / (line.p1.y - line.p0.y);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ if(t < mint){
+ mint = t;
+ p = CVector(x, box.min.y, z);
+ normal = CVector(0.0f, -1.0f, 0.0f);
+ }
+ }
+ }
+
+ // max y plane
+ if((line.p0.y - box.max.y) * (line.p1.y - box.max.y) < 0.0f){
+ t = (line.p0.y - box.max.y) / (line.p0.y - line.p1.y);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ z = line.p0.z + (line.p1.z - line.p0.z)*t;
+ if(z > box.min.z && z < box.max.z)
+ if(t < mint){
+ mint = t;
+ p = CVector(x, box.max.y, z);
+ normal = CVector(0.0f, 1.0f, 0.0f);
+ }
+ }
+ }
+
+ // min z plne
+ if((box.min.z - line.p0.z) * (box.min.z - line.p1.z) < 0.0f){
+ t = (box.min.z - line.p0.z) / (line.p1.z - line.p0.z);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y)
+ if(t < mint){
+ mint = t;
+ p = CVector(x, y, box.min.z);
+ normal = CVector(0.0f, 0.0f, -1.0f);
+ }
+ }
+ }
+
+ // max z plane
+ if((line.p0.z - box.max.z) * (line.p1.z - box.max.z) < 0.0f){
+ t = (line.p0.z - box.max.z) / (line.p0.z - line.p1.z);
+ x = line.p0.x + (line.p1.x - line.p0.x)*t;
+ if(x > box.min.x && x < box.max.x){
+ y = line.p0.y + (line.p1.y - line.p0.y)*t;
+ if(y > box.min.y && y < box.max.y)
+ if(t < mint){
+ mint = t;
+ p = CVector(x, y, box.max.z);
+ normal = CVector(0.0f, 0.0f, 1.0f);
+ }
+ }
+ }
+
+ if(mint >= mindist)
+ return false;
+
+ point.point = p;
+ point.normal = normal;
+ point.surfaceA = 0;
+ point.pieceA = 0;
+ point.surfaceB = box.surface;
+ point.pieceB = box.piece;
+ mindist = mint;
+
+ return true;
+}
+
+// If line.p0 lies inside sphere, no collision is registered.
+bool
+CCollision::ProcessLineSphere(const CColLine &line, const CColSphere &sphere, CColPoint &point, float &mindist)
+{
+ CVector v01 = line.p1 - line.p0;
+ CVector v0c = sphere.center - line.p0;
+ float linesq = v01.MagnitudeSqr();
+ // project v0c onto v01, scaled by |v01| this is the midpoint of the two intersections
+ float projline = DotProduct(v01, v0c);
+ // tangent of p0 to sphere, scaled by linesq just like projline^2
+ float tansq = (v0c.MagnitudeSqr() - sphere.radius*sphere.radius) * linesq;
+ // this works out to be the square of the distance between the midpoint and the intersections
+ float diffsq = projline*projline - tansq;
+ // no intersection
+ if(diffsq < 0.0f)
+ return false;
+ // point of first intersection, in range [0,1] between p0 and p1
+ float t = (projline - sqrt(diffsq)) / linesq;
+ // if not on line or beyond mindist, no intersection
+ if(t < 0.0f || t > 1.0f || t >= mindist)
+ return false;
+ point.point = line.p0 + v01*t;
+ point.normal = point.point - sphere.center;
+ point.normal.Normalise();
+ point.surfaceA = 0;
+ point.pieceA = 0;
+ point.surfaceB = sphere.surface;
+ point.pieceB = sphere.piece;
+ mindist = t;
+ return true;
+}
+
+bool
+CCollision::ProcessVerticalLineTriangle(const CColLine &line,
+ const CVector *verts, const CColTriangle &tri, const CColTrianglePlane &plane,
+ CColPoint &point, float &mindist, CStoredCollPoly *poly)
+{
+ float t;
+ CVector normal;
+
+ const CVector &p0 = line.p0;
+ const CVector &va = verts[tri.a];
+ const CVector &vb = verts[tri.b];
+ const CVector &vc = verts[tri.c];
+
+ // early out bound rect test
+ if(p0.x < va.x && p0.x < vb.x && p0.x < vc.x) return false;
+ if(p0.x > va.x && p0.x > vb.x && p0.x > vc.x) return false;
+ if(p0.y < va.y && p0.y < vb.y && p0.y < vc.y) return false;
+ if(p0.y > va.y && p0.y > vb.y && p0.y > vc.y) return false;
+
+ plane.GetNormal(normal);
+ // if points are on the same side, no collision
+ if(plane.CalcPoint(p0) * plane.CalcPoint(line.p1) > 0.0f)
+ return false;
+
+ // intersection parameter on line
+ float h = (line.p1 - p0).z;
+ t = -plane.CalcPoint(p0) / (h * normal.z);
+ // early out if we're beyond the mindist
+ if(t >= mindist)
+ return false;
+ CVector p(p0.x, p0.y, p0.z + h*t);
+
+ CVector2D vec1, vec2, vec3, vect;
+ switch(plane.dir){
+ case DIR_X_POS:
+ vec1.x = va.y; vec1.y = va.z;
+ vec2.x = vc.y; vec2.y = vc.z;
+ vec3.x = vb.y; vec3.y = vb.z;
+ vect.x = p.y; vect.y = p.z;
+ break;
+ case DIR_X_NEG:
+ vec1.x = va.y; vec1.y = va.z;
+ vec2.x = vb.y; vec2.y = vb.z;
+ vec3.x = vc.y; vec3.y = vc.z;
+ vect.x = p.y; vect.y = p.z;
+ break;
+ case DIR_Y_POS:
+ vec1.x = va.z; vec1.y = va.x;
+ vec2.x = vc.z; vec2.y = vc.x;
+ vec3.x = vb.z; vec3.y = vb.x;
+ vect.x = p.z; vect.y = p.x;
+ break;
+ case DIR_Y_NEG:
+ vec1.x = va.z; vec1.y = va.x;
+ vec2.x = vb.z; vec2.y = vb.x;
+ vec3.x = vc.z; vec3.y = vc.x;
+ vect.x = p.z; vect.y = p.x;
+ break;
+ case DIR_Z_POS:
+ vec1.x = va.x; vec1.y = va.y;
+ vec2.x = vc.x; vec2.y = vc.y;
+ vec3.x = vb.x; vec3.y = vb.y;
+ vect.x = p.x; vect.y = p.y;
+ break;
+ case DIR_Z_NEG:
+ vec1.x = va.x; vec1.y = va.y;
+ vec2.x = vb.x; vec2.y = vb.y;
+ vec3.x = vc.x; vec3.y = vc.y;
+ vect.x = p.x; vect.y = p.y;
+ break;
+ default:
+ assert(0);
+ }
+ if(CrossProduct2D(vec2-vec1, vect-vec1) < 0.0f) return false;
+ if(CrossProduct2D(vec3-vec1, vect-vec1) > 0.0f) return false;
+ if(CrossProduct2D(vec3-vec2, vect-vec2) < 0.0f) return false;
+ point.point = p;
+ point.normal = normal;
+ point.surfaceA = 0;
+ point.pieceA = 0;
+ point.surfaceB = tri.surface;
+ point.pieceB = 0;
+ if(poly){
+ poly->verts[0] = va;
+ poly->verts[1] = vb;
+ poly->verts[2] = vc;
+ poly->valid = true;
+ }
+ mindist = t;
+ return true;
+}
+
+bool
+CCollision::ProcessLineTriangle(const CColLine &line ,
+ const CVector *verts, const CColTriangle &tri, const CColTrianglePlane &plane,
+ CColPoint &point, float &mindist)
+{
+ float t;
+ CVector normal;
+ plane.GetNormal(normal);
+
+ // if points are on the same side, no collision
+ if(plane.CalcPoint(line.p0) * plane.CalcPoint(line.p1) > 0.0f)
+ return false;
+
+ // intersection parameter on line
+ t = -plane.CalcPoint(line.p0) / DotProduct(line.p1 - line.p0, normal);
+ // early out if we're beyond the mindist
+ if(t >= mindist)
+ return false;
+ // find point of intersection
+ CVector p = line.p0 + (line.p1-line.p0)*t;
+
+ const CVector &va = verts[tri.a];
+ const CVector &vb = verts[tri.b];
+ const CVector &vc = verts[tri.c];
+ CVector2D vec1, vec2, vec3, vect;
+
+ switch(plane.dir){
+ case DIR_X_POS:
+ vec1.x = va.y; vec1.y = va.z;
+ vec2.x = vc.y; vec2.y = vc.z;
+ vec3.x = vb.y; vec3.y = vb.z;
+ vect.x = p.y; vect.y = p.z;
+ break;
+ case DIR_X_NEG:
+ vec1.x = va.y; vec1.y = va.z;
+ vec2.x = vb.y; vec2.y = vb.z;
+ vec3.x = vc.y; vec3.y = vc.z;
+ vect.x = p.y; vect.y = p.z;
+ break;
+ case DIR_Y_POS:
+ vec1.x = va.z; vec1.y = va.x;
+ vec2.x = vc.z; vec2.y = vc.x;
+ vec3.x = vb.z; vec3.y = vb.x;
+ vect.x = p.z; vect.y = p.x;
+ break;
+ case DIR_Y_NEG:
+ vec1.x = va.z; vec1.y = va.x;
+ vec2.x = vb.z; vec2.y = vb.x;
+ vec3.x = vc.z; vec3.y = vc.x;
+ vect.x = p.z; vect.y = p.x;
+ break;
+ case DIR_Z_POS:
+ vec1.x = va.x; vec1.y = va.y;
+ vec2.x = vc.x; vec2.y = vc.y;
+ vec3.x = vb.x; vec3.y = vb.y;
+ vect.x = p.x; vect.y = p.y;
+ break;
+ case DIR_Z_NEG:
+ vec1.x = va.x; vec1.y = va.y;
+ vec2.x = vb.x; vec2.y = vb.y;
+ vec3.x = vc.x; vec3.y = vc.y;
+ vect.x = p.x; vect.y = p.y;
+ break;
+ default:
+ assert(0);
+ }
+ if(CrossProduct2D(vec2-vec1, vect-vec1) < 0.0f) return false;
+ if(CrossProduct2D(vec3-vec1, vect-vec1) > 0.0f) return false;
+ if(CrossProduct2D(vec3-vec2, vect-vec2) < 0.0f) return false;
+ point.point = p;
+ point.normal = normal;
+ point.surfaceA = 0;
+ point.pieceA = 0;
+ point.surfaceB = tri.surface;
+ point.pieceB = 0;
+ mindist = t;
+ return true;
+}
+
+bool
+CCollision::ProcessSphereTriangle(const CColSphere &sphere,
+ const CVector *verts, const CColTriangle &tri, const CColTrianglePlane &plane,
+ CColPoint &point, float &mindistsq)
+{
+ // If sphere and plane don't intersect, no collision
+ float planedist = plane.CalcPoint(sphere.center);
+ float distsq = planedist*planedist;
+ if(fabs(planedist) > sphere.radius || distsq > mindistsq)
+ return false;
+
+ const CVector &va = verts[tri.a];
+ const CVector &vb = verts[tri.b];
+ const CVector &vc = verts[tri.c];
+
+ // calculate two orthogonal basis vectors for the triangle
+ CVector normal;
+ plane.GetNormal(normal);
+ CVector vec2 = vb - va;
+ float len = vec2.Magnitude();
+ vec2 = vec2 * (1.0f/len);
+ CVector vec1 = CrossProduct(vec2, normal);
+
+ // We know A has local coordinate [0,0] and B has [0,len].
+ // Now calculate coordinates on triangle for these two vectors:
+ CVector vac = vc - va;
+ CVector vas = sphere.center - va;
+ CVector2D b(0.0f, len);
+ CVector2D c(DotProduct(vec1, vac), DotProduct(vec2, vac));
+ CVector2D s(DotProduct(vec1, vas), DotProduct(vec2, vas));
+
+ // The three triangle lines partition the space into 6 sectors,
+ // find out in which the center lies.
+ int insideAB = CrossProduct2D(s, b) >= 0.0f;
+ int insideAC = CrossProduct2D(c, s) >= 0.0f;
+ int insideBC = CrossProduct2D(s-b, c-b) >= 0.0f;
+
+ int testcase = insideAB + insideAC + insideBC;
+ float dist = 0.0f;
+ CVector p;
+ if(testcase == 1){
+ // closest to a vertex
+ if(insideAB) p = vc;
+ else if(insideAC) p = vb;
+ else if(insideBC) p = va;
+ else assert(0);
+ dist = (sphere.center - p).Magnitude();
+ }else if(testcase == 2){
+ // closest to an edge
+ if(!insideAB) dist = DistToLine(&va, &vb, &sphere.center, p);
+ else if(!insideAC) dist = DistToLine(&va, &vc, &sphere.center, p);
+ else if(!insideBC) dist = DistToLine(&vb, &vc, &sphere.center, p);
+ else assert(0);
+ }else if(testcase == 3){
+ // center is in triangle
+ dist = fabs(planedist);
+ p = sphere.center - normal*planedist;
+ }else
+ assert(0); // front fell off
+
+ if(dist >= sphere.radius || dist*dist >= mindistsq)
+ return false;
+
+ point.point = p;
+ point.normal = sphere.center - p;
+ point.normal.Normalise();
+ point.surfaceA = sphere.surface;
+ point.pieceA = sphere.piece;
+ point.surfaceB = tri.surface;
+ point.pieceB = 0;
+ point.depth = sphere.radius - dist;
+ mindistsq = dist*dist;
+ return true;
+}
+
+bool
+CCollision::ProcessLineOfSight(const CColLine &line,
+ const CMatrix &matrix, CColModel &model,
+ CColPoint &point, float &mindist, bool ignoreSurf78)
+{
+ static CMatrix matTransform;
+ int i;
+
+ // transform line to model space
+ Invert(matrix, matTransform);
+ CColLine newline(matTransform * line.p0, matTransform * line.p1);
+
+ // If we don't intersect with the bounding box, no chance on the rest
+ if(!TestLineBox(newline, model.boundingBox))
+ return false;
+
+ float coldist = mindist;
+ for(i = 0; i < model.numSpheres; i++)
+ if(!ignoreSurf78 || model.spheres[i].surface != 7 && model.spheres[i].surface != 8)
+ ProcessLineSphere(newline, model.spheres[i], point, coldist);
+
+ for(i = 0; i < model.numBoxes; i++)
+ if(!ignoreSurf78 || model.boxes[i].surface != 7 && model.boxes[i].surface != 8)
+ ProcessLineBox(newline, model.boxes[i], point, coldist);
+
+ CalculateTrianglePlanes(&model);
+ for(i = 0; i < model.numTriangles; i++)
+ if(!ignoreSurf78 || model.triangles[i].surface != 7 && model.triangles[i].surface != 8)
+ ProcessLineTriangle(newline, model.vertices, model.triangles[i], model.trianglePlanes[i], point, coldist);
+
+ if(coldist < mindist){
+ point.point = matrix * point.point;
+ point.normal = Multiply3x3(matrix, point.normal);
+ mindist = coldist;
+ return true;
+ }
+ return false;
+}
+
+bool
+CCollision::ProcessVerticalLine(const CColLine &line,
+ const CMatrix &matrix, CColModel &model,
+ CColPoint &point, float &mindist, bool ignoreSurf78, CStoredCollPoly *poly)
+{
+ static CStoredCollPoly TempStoredPoly;
+ int i;
+
+ // transform line to model space
+ // Why does the game seem to do this differently than above?
+ CColLine newline(MultiplyInverse(matrix, line.p0), MultiplyInverse(matrix, line.p1));
+ newline.p1.x = newline.p0.x;
+ newline.p1.y = newline.p0.y;
+
+ if(!TestVerticalLineBox(newline, model.boundingBox))
+ return false;
+
+ float coldist = mindist;
+ for(i = 0; i < model.numSpheres; i++)
+ if(!ignoreSurf78 || model.spheres[i].surface != 7 && model.spheres[i].surface != 8)
+ ProcessLineSphere(newline, model.spheres[i], point, coldist);
+
+ for(i = 0; i < model.numBoxes; i++)
+ if(!ignoreSurf78 || model.boxes[i].surface != 7 && model.boxes[i].surface != 8)
+ ProcessLineBox(newline, model.boxes[i], point, coldist);
+
+ CalculateTrianglePlanes(&model);
+ TempStoredPoly.valid = false;
+ for(i = 0; i < model.numTriangles; i++)
+ if(!ignoreSurf78 || model.triangles[i].surface != 7 && model.triangles[i].surface != 8)
+ ProcessVerticalLineTriangle(newline, model.vertices, model.triangles[i], model.trianglePlanes[i], point, coldist, &TempStoredPoly);
+
+ if(coldist < mindist){
+ point.point = matrix * point.point;
+ point.normal = Multiply3x3(matrix, point.normal);
+ if(poly && TempStoredPoly.valid){
+ *poly = TempStoredPoly;
+ poly->verts[0] = matrix * poly->verts[0];
+ poly->verts[1] = matrix * poly->verts[1];
+ poly->verts[2] = matrix * poly->verts[2];
+ }
+ mindist = coldist;
+ return true;
+ }
+ return false;
+}
+
+enum {
+ MAXNUMSPHERES = 128,
+ MAXNUMBOXES = 32,
+ MAXNUMLINES = 16,
+ MAXNUMTRIS = 600
+};
+
+// This checks model A's spheres and lines against model B's spheres, boxes and triangles.
+// Returns the number of A's spheres that collide.
+// Returned ColPoints are in world space.
+// NB: lines do not seem to be supported very well, use with caution
+int32
+CCollision::ProcessColModels(const CMatrix &matrixA, CColModel &modelA,
+ const CMatrix &matrixB, CColModel &modelB,
+ CColPoint *spherepoints, CColPoint *linepoints, float *linedists)
+{
+ static int aSphereIndicesA[MAXNUMSPHERES];
+ static int aLineIndicesA[MAXNUMLINES];
+ static int aSphereIndicesB[MAXNUMSPHERES];
+ static int aBoxIndicesB[MAXNUMBOXES];
+ static int aTriangleIndicesB[MAXNUMTRIS];
+ static bool aCollided[MAXNUMLINES];
+ static CColSphere aSpheresA[MAXNUMSPHERES];
+ static CColLine aLinesA[MAXNUMLINES];
+ static CMatrix matAB, matBA;
+ CColSphere s;
+ int i, j;
+
+ assert(modelA.numSpheres <= MAXNUMSPHERES);
+ assert(modelA.numLines <= MAXNUMLINES);
+
+ // From model A space to model B space
+ matAB = Invert(matrixB, matAB) * matrixA;
+
+ CColSphere bsphereAB; // bounding sphere of A in B space
+ bsphereAB.Set(modelA.boundingSphere.radius, matAB * modelA.boundingSphere.center);
+ if(!TestSphereBox(bsphereAB, modelB.boundingBox))
+ return 0;
+ // B to A space
+ matBA = Invert(matrixA, matBA) * matrixB;
+
+ // transform modelA's spheres and lines to B space
+ for(i = 0; i < modelA.numSpheres; i++){
+ CColSphere &s = modelA.spheres[i];
+ aSpheresA[i].Set(s.radius, matAB * s.center, s.surface, s.piece);
+ }
+ for(i = 0; i < modelA.numLines; i++)
+ aLinesA[i].Set(matAB * modelA.lines[i].p0, matAB * modelA.lines[i].p1);
+
+ // Test them against model B's bounding volumes
+ int numSpheresA = 0;
+ int numLinesA = 0;
+ for(i = 0; i < modelA.numSpheres; i++)
+ if(TestSphereBox(aSpheresA[i], modelB.boundingBox))
+ aSphereIndicesA[numSpheresA++] = i;
+ // no actual check???
+ for(i = 0; i < modelA.numLines; i++)
+ aLineIndicesA[numLinesA++] = i;
+ // No collision
+ if(numSpheresA == 0 && numLinesA == 0)
+ return 0;
+
+ // Check model B against A's bounding volumes
+ int numSpheresB = 0;
+ int numBoxesB = 0;
+ int numTrianglesB = 0;
+ for(i = 0; i < modelB.numSpheres; i++){
+ s.Set(modelB.spheres[i].radius, matBA * modelB.spheres[i].center);
+ if(TestSphereBox(s, modelA.boundingBox))
+ aSphereIndicesB[numSpheresB++] = i;
+ }
+ for(i = 0; i < modelB.numBoxes; i++)
+ if(TestSphereBox(bsphereAB, modelB.boxes[i]))
+ aBoxIndicesB[numBoxesB++] = i;
+ CalculateTrianglePlanes(&modelB);
+ for(i = 0; i < modelB.numTriangles; i++)
+ if(TestSphereTriangle(bsphereAB, modelB.vertices, modelB.triangles[i], modelB.trianglePlanes[i]))
+ aTriangleIndicesB[numTrianglesB++] = i;
+ assert(numSpheresB <= MAXNUMSPHERES);
+ assert(numBoxesB <= MAXNUMBOXES);
+ assert(numTrianglesB <= MAXNUMTRIS);
+ // No collision
+ if(numSpheresB == 0 && numBoxesB == 0 && numTrianglesB == 0)
+ return 0;
+
+ // We now have the collision volumes in A and B that are worth processing.
+
+ // Process A's spheres against B's collision volumes
+ int numCollisions = 0;
+ for(i = 0; i < numSpheresA; i++){
+ float coldist = 1.0e24f;
+ bool hasCollided = false;
+
+ for(j = 0; j < numSpheresB; j++)
+ hasCollided |= ProcessSphereSphere(
+ aSpheresA[aSphereIndicesA[i]],
+ modelB.spheres[aSphereIndicesB[j]],
+ spherepoints[numCollisions], coldist);
+ for(j = 0; j < numBoxesB; j++)
+ hasCollided |= ProcessSphereBox(
+ aSpheresA[aSphereIndicesA[i]],
+ modelB.boxes[aBoxIndicesB[j]],
+ spherepoints[numCollisions], coldist);
+ for(j = 0; j < numTrianglesB; j++)
+ hasCollided |= ProcessSphereTriangle(
+ aSpheresA[aSphereIndicesA[i]],
+ modelB.vertices,
+ modelB.triangles[aTriangleIndicesB[j]],
+ modelB.trianglePlanes[aTriangleIndicesB[j]],
+ spherepoints[numCollisions], coldist);
+ if(hasCollided)
+ numCollisions++;
+ }
+ for(i = 0; i < numCollisions; i++){
+ spherepoints[i].point = matrixB * spherepoints[i].point;
+ spherepoints[i].normal = Multiply3x3(matrixB, spherepoints[i].normal);
+ }
+
+ // And the same thing for the lines in A
+ for(i = 0; i < numLinesA; i++){
+ aCollided[i] = false;
+
+ for(j = 0; j < numSpheresB; j++)
+ aCollided[i] |= ProcessLineSphere(
+ aLinesA[aLineIndicesA[i]],
+ modelB.spheres[aSphereIndicesB[j]],
+ linepoints[aLineIndicesA[i]],
+ linedists[aLineIndicesA[i]]);
+ for(j = 0; j < numBoxesB; j++)
+ aCollided[i] |= ProcessLineBox(
+ aLinesA[aLineIndicesA[i]],
+ modelB.boxes[aBoxIndicesB[j]],
+ linepoints[aLineIndicesA[i]],
+ linedists[aLineIndicesA[i]]);
+ for(j = 0; j < numTrianglesB; j++)
+ aCollided[i] |= ProcessLineTriangle(
+ aLinesA[aLineIndicesA[i]],
+ modelB.vertices,
+ modelB.triangles[aTriangleIndicesB[j]],
+ modelB.trianglePlanes[aTriangleIndicesB[j]],
+ linepoints[aLineIndicesA[i]],
+ linedists[aLineIndicesA[i]]);
+ }
+ for(i = 0; i < numLinesA; i++)
+ if(aCollided[i]){
+ j = aLineIndicesA[i];
+ linepoints[j].point = matrixB * linepoints[j].point;
+ linepoints[j].normal = Multiply3x3(matrixB, linepoints[j].normal);
+ }
+
+ return numCollisions; // sphere collisions
+}
+
+
+//
+// Misc
+//
+
+float
+CCollision::DistToLine(const CVector *l0, const CVector *l1, const CVector *point)
+{
+ float lensq = (*l1 - *l0).MagnitudeSqr();
+ float dot = DotProduct(*point - *l0, *l1 - *l0);
+ // Between 0 and len we're above the line.
+ // if not, calculate distance to endpoint
+ if(dot <= 0.0f)
+ return (*point - *l0).Magnitude();
+ if(dot >= lensq)
+ return (*point - *l1).Magnitude();
+ // distance to line
+ return sqrt((*point - *l0).MagnitudeSqr() - dot*dot/lensq);
+}
+
+// same as above but also return the point on the line
+float
+CCollision::DistToLine(const CVector *l0, const CVector *l1, const CVector *point, CVector &closest)
+{
+ float lensq = (*l1 - *l0).MagnitudeSqr();
+ float dot = DotProduct(*point - *l0, *l1 - *l0);
+ // find out which point we're closest to
+ if(dot <= 0.0f)
+ closest = *l0;
+ else if(dot >= lensq)
+ closest = *l1;
+ else
+ closest = *l0 + (*l1 - *l0)*(dot/lensq);
+ // this is the distance
+ return (*point - closest).Magnitude();
+}
+
+void
+CCollision::CalculateTrianglePlanes(CColModel *model)
+{
+ if(model->numTriangles == 0)
+ return;
+
+ CLink<CColModel*> *lptr;
+ if(model->trianglePlanes){
+ // re-insert at front so it's not removed again soon
+ lptr = model->GetLinkPtr();
+ lptr->Remove();
+ ms_colModelCache.head.Insert(lptr);
+ }else{
+ assert(model);
+ lptr = ms_colModelCache.Insert(model);
+ if(lptr == nil){
+ // make room if we have to, remove last in list
+ lptr = ms_colModelCache.tail.prev;
+ assert(lptr);
+ assert(lptr->item);
+ lptr->item->RemoveTrianglePlanes();
+ ms_colModelCache.Remove(lptr);
+ // now this cannot fail
+ lptr = ms_colModelCache.Insert(model);
+ assert(lptr);
+ }
+ model->CalculateTrianglePlanes();
+ model->SetLinkPtr(lptr);
+ }
+}
+
+void
+CCollision::DrawColModel(const CMatrix &mat, const CColModel &colModel)
+{
+}
+
+void
+CCollision::DrawColModel_Coloured(const CMatrix &mat, const CColModel &colModel, int32 id)
+{
+ int i;
+ int s;
+ float f;
+ CVector verts[8];
+ CVector min, max;
+ int r, g, b;
+ RwImVertexIndex *iptr;
+ RwIm3DVertex *vptr;
+
+ RenderBuffer::ClearRenderBuffer();
+ RwRenderStateSet(rwRENDERSTATEZWRITEENABLE, (void*)TRUE);
+ RwRenderStateSet(rwRENDERSTATEVERTEXALPHAENABLE, (void*)TRUE);
+ RwRenderStateSet(rwRENDERSTATESRCBLEND, (void*)rwBLENDSRCALPHA);
+ RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDINVSRCALPHA);
+ RwRenderStateSet(rwRENDERSTATETEXTURERASTER, nil);
+
+ for(i = 0; i < colModel.numTriangles; i++){
+ colModel.GetTrianglePoint(verts[0], colModel.triangles[i].a);
+ colModel.GetTrianglePoint(verts[1], colModel.triangles[i].b);
+ colModel.GetTrianglePoint(verts[2], colModel.triangles[i].c);
+ verts[0] = mat * verts[0];
+ verts[1] = mat * verts[1];
+ verts[2] = mat * verts[2];
+
+ // TODO: surface
+ r = 255;
+ g = 128;
+ b = 0;
+
+ s = colModel.triangles[i].surface;
+ f = (s & 0xF)/32.0f + 0.5f;
+ switch(CSurfaceTable::GetAdhesionGroup(s)){
+ case ADHESIVE_RUBBER:
+ r = f * 255.0f;
+ g = 0;
+ b = 0;
+ break;
+ case ADHESIVE_HARD:
+ r = f*255.0f;
+ g = f*255.0f;
+ b = f*128.0f;
+ break;
+ case ADHESIVE_ROAD:
+ r = f*128.0f;
+ g = f*128.0f;
+ b = f*128.0f;
+ break;
+ case ADHESIVE_LOOSE:
+ r = 0;
+ g = f * 255.0f;
+ b = 0;
+ break;
+ case ADHESIVE_WET:
+ r = 0;
+ g = 0;
+ b = f * 255.0f;
+ break;
+ default:
+ // this doesn't make much sense
+ r *= f;
+ g *= f;
+ b *= f;
+ }
+
+ // TODO: make some surface types flicker?
+
+ if(s > SURFACE_32){
+ r = CGeneral::GetRandomNumber();
+ g = CGeneral::GetRandomNumber();
+ b = CGeneral::GetRandomNumber();
+ printf("Illegal surfacetype:%d on MI:%d\n", s, id);
+ }
+
+ RenderBuffer::StartStoring(6, 3, &iptr, &vptr);
+ RwIm3DVertexSetRGBA(&vptr[0], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[1], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[2], r, g, b, 255);
+ RwIm3DVertexSetU(&vptr[0], 0.0f);
+ RwIm3DVertexSetV(&vptr[0], 0.0f);
+ RwIm3DVertexSetU(&vptr[1], 0.0f);
+ RwIm3DVertexSetV(&vptr[1], 1.0f);
+ RwIm3DVertexSetU(&vptr[2], 1.0f);
+ RwIm3DVertexSetV(&vptr[2], 1.0f);
+ RwIm3DVertexSetPos(&vptr[0], verts[0].x, verts[0].y, verts[0].z);
+ RwIm3DVertexSetPos(&vptr[1], verts[1].x, verts[1].y, verts[1].z);
+ RwIm3DVertexSetPos(&vptr[2], verts[2].x, verts[2].y, verts[2].z);
+ iptr[0] = 0; iptr[1] = 1; iptr[2] = 2;
+ iptr[3] = 0; iptr[4] = 2; iptr[5] = 1;
+ RenderBuffer::StopStoring();
+ }
+
+ for(i = 0; i < colModel.numBoxes; i++){
+ min = colModel.boxes[i].min;
+ max = colModel.boxes[i].max;
+
+ verts[0] = mat * CVector(min.x, min.y, min.z);
+ verts[1] = mat * CVector(min.x, min.y, max.z);
+ verts[2] = mat * CVector(min.x, max.y, min.z);
+ verts[3] = mat * CVector(min.x, max.y, max.z);
+ verts[4] = mat * CVector(max.x, min.y, min.z);
+ verts[5] = mat * CVector(max.x, min.y, max.z);
+ verts[6] = mat * CVector(max.x, max.y, min.z);
+ verts[7] = mat * CVector(max.x, max.y, max.z);
+
+ s = colModel.boxes[i].surface;
+ f = (s & 0xF)/32.0f + 0.5f;
+ switch(CSurfaceTable::GetAdhesionGroup(s)){
+ case ADHESIVE_RUBBER:
+ r = f * 255.0f;
+ g = 0;
+ b = 0;
+ break;
+ case ADHESIVE_HARD:
+ r = f*255.0f;
+ g = f*255.0f;
+ b = f*128.0f;
+ break;
+ case ADHESIVE_ROAD:
+ r = f*128.0f;
+ g = f*128.0f;
+ b = f*128.0f;
+ break;
+ case ADHESIVE_LOOSE:
+ r = 0;
+ g = f * 255.0f;
+ b = 0;
+ break;
+ case ADHESIVE_WET:
+ r = 0;
+ g = 0;
+ b = f * 255.0f;
+ break;
+ default:
+ // this doesn't make much sense
+ r *= f;
+ g *= f;
+ b *= f;
+ }
+
+ // TODO: make some surface types flicker?
+
+ RenderBuffer::StartStoring(36, 8, &iptr, &vptr);
+ RwIm3DVertexSetRGBA(&vptr[0], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[1], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[2], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[3], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[4], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[5], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[6], r, g, b, 255);
+ RwIm3DVertexSetRGBA(&vptr[7], r, g, b, 255);
+ RwIm3DVertexSetU(&vptr[0], 0.0f);
+ RwIm3DVertexSetV(&vptr[0], 0.0f);
+ RwIm3DVertexSetU(&vptr[1], 0.0f);
+ RwIm3DVertexSetV(&vptr[1], 1.0f);
+ RwIm3DVertexSetU(&vptr[2], 1.0f);
+ RwIm3DVertexSetV(&vptr[2], 1.0f);
+ RwIm3DVertexSetU(&vptr[3], 0.0f);
+ RwIm3DVertexSetV(&vptr[3], 0.0f);
+ RwIm3DVertexSetU(&vptr[4], 0.0f);
+ RwIm3DVertexSetV(&vptr[4], 1.0f);
+ RwIm3DVertexSetU(&vptr[5], 1.0f);
+ RwIm3DVertexSetV(&vptr[5], 1.0f);
+ RwIm3DVertexSetU(&vptr[6], 0.0f);
+ RwIm3DVertexSetV(&vptr[6], 1.0f);
+ RwIm3DVertexSetU(&vptr[7], 1.0f);
+ RwIm3DVertexSetV(&vptr[7], 1.0f);
+ RwIm3DVertexSetPos(&vptr[0], verts[0].x, verts[0].y, verts[0].z);
+ RwIm3DVertexSetPos(&vptr[1], verts[1].x, verts[1].y, verts[1].z);
+ RwIm3DVertexSetPos(&vptr[2], verts[2].x, verts[2].y, verts[2].z);
+ RwIm3DVertexSetPos(&vptr[3], verts[3].x, verts[3].y, verts[3].z);
+ RwIm3DVertexSetPos(&vptr[4], verts[4].x, verts[4].y, verts[4].z);
+ RwIm3DVertexSetPos(&vptr[5], verts[5].x, verts[5].y, verts[5].z);
+ RwIm3DVertexSetPos(&vptr[6], verts[6].x, verts[6].y, verts[6].z);
+ RwIm3DVertexSetPos(&vptr[7], verts[7].x, verts[7].y, verts[7].z);
+ iptr[0] = 0; iptr[1] = 1; iptr[2] = 2;
+ iptr[3] = 1; iptr[4] = 3; iptr[5] = 2;
+ iptr[6] = 1; iptr[7] = 5; iptr[8] = 7;
+ iptr[9] = 1; iptr[10] = 7; iptr[11] = 3;
+ iptr[12] = 2; iptr[13] = 3; iptr[14] = 7;
+ iptr[15] = 2; iptr[16] = 7; iptr[17] = 6;
+ iptr[18] = 0; iptr[19] = 5; iptr[20] = 1;
+ iptr[21] = 0; iptr[22] = 4; iptr[23] = 5;
+ iptr[24] = 0; iptr[25] = 2; iptr[26] = 4;
+ iptr[27] = 2; iptr[28] = 6; iptr[29] = 4;
+ iptr[30] = 4; iptr[31] = 6; iptr[32] = 7;
+ iptr[33] = 4; iptr[34] = 7; iptr[35] = 5;
+ RenderBuffer::StopStoring();
+ }
+
+ RenderBuffer::RenderStuffInBuffer();
+ RwRenderStateSet(rwRENDERSTATESRCBLEND, (void*)rwBLENDSRCALPHA);
+ RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDINVSRCALPHA);
+ RwRenderStateSet(rwRENDERSTATEVERTEXALPHAENABLE, (void*)FALSE);
+ RwRenderStateSet(rwRENDERSTATEZWRITEENABLE, (void*)TRUE);
+ RwRenderStateSet(rwRENDERSTATEZTESTENABLE, (void*)TRUE);
+}
+
+
+/*
+ * ColModel code
+ */
+
+void
+CColSphere::Set(float radius, const CVector &center, uint8 surf, uint8 piece)
+{
+ this->radius = radius;
+ this->center = center;
+ this->surface = surf;
+ this->piece = piece;
+}
+
+void
+CColBox::Set(const CVector &min, const CVector &max, uint8 surf, uint8 piece)
+{
+ this->min = min;
+ this->max = max;
+ this->surface = surf;
+ this->piece = piece;
+}
+
+void
+CColLine::Set(const CVector &p0, const CVector &p1)
+{
+ this->p0 = p0;
+ this->p1 = p1;
+}
+
+void
+CColTriangle::Set(const CVector *, int a, int b, int c, uint8 surf, uint8 piece)
+{
+ this->a = a;
+ this->b = b;
+ this->c = c;
+ this->surface = surf;
+}
+
+void
+CColTrianglePlane::Set(const CVector *v, CColTriangle &tri)
+{
+ const CVector &va = v[tri.a];
+ const CVector &vb = v[tri.b];
+ const CVector &vc = v[tri.c];
+
+ normal = CrossProduct(vc-va, vb-va);
+ normal.Normalise();
+ dist = DotProduct(normal, va);
+ CVector an(fabs(normal.x), fabs(normal.y), fabs(normal.z));
+ // find out largest component and its direction
+ if(an.x > an.y && an.x > an.z)
+ dir = normal.x < 0.0f ? DIR_X_NEG : DIR_X_POS;
+ else if(an.y > an.z)
+ dir = normal.y < 0.0f ? DIR_Y_NEG : DIR_Y_POS;
+ else
+ dir = normal.z < 0.0f ? DIR_Z_NEG : DIR_Z_POS;
+}
+
+CColModel::CColModel(void)
+{
+ numSpheres = 0;
+ spheres = nil;
+ numLines = 0;
+ lines = nil;
+ numBoxes = 0;
+ boxes = nil;
+ numTriangles = 0;
+ vertices = nil;
+ triangles = nil;
+ trianglePlanes = nil;
+ level = CGame::currLevel;
+ ownsCollisionVolumes = true;
+}
+
+CColModel::~CColModel(void)
+{
+ RemoveCollisionVolumes();
+ RemoveTrianglePlanes();
+}
+
+void
+CColModel::RemoveCollisionVolumes(void)
+{
+ if(ownsCollisionVolumes){
+ RwFree(spheres);
+ RwFree(lines);
+ RwFree(boxes);
+ RwFree(vertices);
+ RwFree(triangles);
+ }
+ numSpheres = 0;
+ numLines = 0;
+ numBoxes = 0;
+ numTriangles = 0;
+ spheres = nil;
+ lines = nil;
+ boxes = nil;
+ vertices = nil;
+ triangles = nil;
+}
+
+void
+CColModel::CalculateTrianglePlanes(void)
+{
+ // HACK: allocate space for one more element to stuff the link pointer into
+ trianglePlanes = (CColTrianglePlane*)RwMalloc(sizeof(CColTrianglePlane) * (numTriangles+1));
+ for(int i = 0; i < numTriangles; i++)
+ trianglePlanes[i].Set(vertices, triangles[i]);
+}
+
+void
+CColModel::RemoveTrianglePlanes(void)
+{
+ RwFree(trianglePlanes);
+ trianglePlanes = nil;
+}
+
+void
+CColModel::SetLinkPtr(CLink<CColModel*> *lptr)
+{
+ assert(trianglePlanes);
+ *(CLink<CColModel*>**)ALIGNPTR(&trianglePlanes[numTriangles]) = lptr;
+}
+
+CLink<CColModel*>*
+CColModel::GetLinkPtr(void)
+{
+ assert(trianglePlanes);
+ return *(CLink<CColModel*>**)ALIGNPTR(&trianglePlanes[numTriangles]);
+}
+
+void
+CColModel::GetTrianglePoint(CVector &v, int i) const
+{
+ v = vertices[i];
+}
+
+STARTPATCHES
+ InjectHook(0x4B9C30, (CMatrix& (*)(const CMatrix &src, CMatrix &dst))Invert, PATCH_JUMP);
+
+ InjectHook(0x40BB70, CCollision::TestSphereBox, PATCH_JUMP);
+ InjectHook(0x40E130, CCollision::TestLineBox, PATCH_JUMP);
+ InjectHook(0x40E5C0, CCollision::TestVerticalLineBox, PATCH_JUMP);
+ InjectHook(0x40EC10, CCollision::TestLineTriangle, PATCH_JUMP);
+ InjectHook(0x40DAA0, CCollision::TestLineSphere, PATCH_JUMP);
+ InjectHook(0x40C580, CCollision::TestSphereTriangle, PATCH_JUMP);
+ InjectHook(0x40F720, CCollision::TestLineOfSight, PATCH_JUMP);
+
+ InjectHook(0x40B9F0, CCollision::ProcessSphereSphere, PATCH_JUMP);
+ InjectHook(0x40BC00, CCollision::ProcessSphereBox, PATCH_JUMP);
+ InjectHook(0x40E670, CCollision::ProcessLineBox, PATCH_JUMP);
+ InjectHook(0x40DE80, CCollision::ProcessLineSphere, PATCH_JUMP);
+ InjectHook(0x40FB50, CCollision::ProcessVerticalLineTriangle, PATCH_JUMP);
+ InjectHook(0x40F140, CCollision::ProcessLineTriangle, PATCH_JUMP);
+ InjectHook(0x40CE30, CCollision::ProcessSphereTriangle, PATCH_JUMP);
+
+ InjectHook(0x40F910, CCollision::ProcessLineOfSight, PATCH_JUMP);
+ InjectHook(0x410120, CCollision::ProcessVerticalLine, PATCH_JUMP);
+ InjectHook(0x410BE0, CCollision::ProcessColModels, PATCH_JUMP);
+
+ InjectHook(0x40B960, CCollision::CalculateTrianglePlanes, PATCH_JUMP);
+ InjectHook(0x411640, &CLink<CColModel*>::Remove, PATCH_JUMP);
+ InjectHook(0x411620, &CLink<CColModel*>::Insert, PATCH_JUMP);
+ InjectHook(0x4115C0, &CLinkList<CColModel*>::Insert, PATCH_JUMP);
+ InjectHook(0x411600, &CLinkList<CColModel*>::Remove, PATCH_JUMP);
+// InjectHook(0x411530, &CLinkList<CColModel*>::Init, PATCH_JUMP);
+
+ InjectHook(0x411E40, (void (CColSphere::*)(float, const CVector&, uint8, uint8))&CColSphere::Set, PATCH_JUMP);
+ InjectHook(0x40B2A0, &CColBox::Set, PATCH_JUMP);
+ InjectHook(0x40B320, &CColLine::ctor, PATCH_JUMP);
+ InjectHook(0x40B350, &CColLine::Set, PATCH_JUMP);
+ InjectHook(0x411E70, &CColTriangle::Set, PATCH_JUMP);
+
+ InjectHook(0x411EA0, &CColTrianglePlane::Set, PATCH_JUMP);
+ InjectHook(0x412140, &CColTrianglePlane::GetNormal, PATCH_JUMP);
+
+ InjectHook(0x411680, &CColModel::ctor, PATCH_JUMP);
+ InjectHook(0x4116E0, &CColModel::dtor, PATCH_JUMP);
+ InjectHook(0x411D80, &CColModel::RemoveCollisionVolumes, PATCH_JUMP);
+ InjectHook(0x411CB0, &CColModel::CalculateTrianglePlanes, PATCH_JUMP);
+ InjectHook(0x411D10, &CColModel::RemoveTrianglePlanes, PATCH_JUMP);
+ InjectHook(0x411D40, &CColModel::SetLinkPtr, PATCH_JUMP);
+ InjectHook(0x411D60, &CColModel::GetLinkPtr, PATCH_JUMP);
+ENDPATCHES
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 20:28:49 +0100