diff options
Diffstat (limited to 'src/PathFind.cpp')
-rw-r--r-- | src/PathFind.cpp | 591 |
1 files changed, 591 insertions, 0 deletions
diff --git a/src/PathFind.cpp b/src/PathFind.cpp new file mode 100644 index 00000000..c337ca88 --- /dev/null +++ b/src/PathFind.cpp @@ -0,0 +1,591 @@ +#include "common.h" +#include "patcher.h" +#include "PathFind.h" + +CPathFind &ThePaths = *(CPathFind*)0x8F6754; + +int TempListLength; + +enum +{ + NodeTypeExtern = 1, + NodeTypeIntern = 2, + + PathTypeCar = 0, + PathTypePed = 1, + + PathNodeFlag1 = 1, // used? + PathNodeFlag2 = 2, + PathNodeDeadEnd = 4, + PathNodeDisabled = 8, + PathNodeBetweenLevels = 0x10, +}; + +// link flags: +// 1: crosses road +// 2: ped traffic light +// pathnode flags: +// 1: +// 2: +// 4: dead end +// 8: switched off +// 10: road between levels?? +// navi node flags: +// 1: bridge light +// object flags: +// 1 +// 2 east/west road(?) + +CPathInfoForObject *&InfoForTileCars = *(CPathInfoForObject**)0x8F1A8C; +CPathInfoForObject *&InfoForTilePeds = *(CPathInfoForObject**)0x8F1AE4; +// unused +CTempDetachedNode *&DetachedNodesCars = *(CTempDetachedNode**)0x8E2824; +CTempDetachedNode *&DetachedNodesPeds = *(CTempDetachedNode**)0x8E28A0; + +void +CPathFind::PreparePathData(void) +{ + int i, j, k; + int numExtern, numIntern, numLanes; + float maxX, maxY; + CTempNode *tempNodes; + + printf("PreparePathData\n"); + // UNUSED: CPathFind::LoadPathFindData + if(InfoForTileCars && InfoForTilePeds && + DetachedNodesCars && DetachedNodesPeds){ + tempNodes = new CTempNode[4000]; + + m_numLinks = 0; + for(i = 0; i < PATHNODESIZE; i++) + m_pathNodes[i].flags &= ~(PathNodeFlag1 | PathNodeFlag2); + + for(i = 0; i < PATHNODESIZE; i++){ + numExtern = 0; + numIntern = 0; + for(j = 0; j < 12; j++){ + if(InfoForTileCars[i*12 + j].type == NodeTypeExtern) + numExtern++; + if(InfoForTileCars[i*12 + j].type == NodeTypeIntern) + numIntern++; + } + if(numIntern > 1 && numExtern != 2) + printf("ILLEGAL BLOCK. MORE THAN 1 INTERNALS AND NOT 2 EXTERNALS (Modelindex:%d)\n", i); + } + + for(i = 0; i < PATHNODESIZE; i++) + for(j = 0; j < 12; j++) + if(InfoForTileCars[i*12 + j].type == NodeTypeExtern){ + if(InfoForTileCars[i*12 + j].numLeftLanes < 0) + printf("ILLEGAL BLOCK. NEGATIVE NUMBER OF LANES (Obj:%d)\n", i); + if(InfoForTileCars[i*12 + j].numRightLanes < 0) + printf("ILLEGAL BLOCK. NEGATIVE NUMBER OF LANES (Obj:%d)\n", i); + if(InfoForTileCars[i*12 + j].numLeftLanes + InfoForTileCars[i*12 + j].numRightLanes <= 0) + printf("ILLEGAL BLOCK. NO LANES IN NODE (Obj:%d)\n", i); + } + + m_numPathNodes = 0; + PreparePathDataForType(PathTypeCar, tempNodes, InfoForTileCars, 1.0f, DetachedNodesCars, 100); + m_numCarPathNodes = m_numPathNodes; + PreparePathDataForType(PathTypePed, tempNodes, InfoForTilePeds, 1.0f, DetachedNodesPeds, 50); + m_numPedPathNodes = m_numPathNodes - m_numCarPathNodes; + + // TODO: figure out what exactly is going on here + // Some roads seem to get a west/east flag + for(i = 0; i < m_numMapObjects; i++){ + numExtern = 0; + numIntern = 0; + numLanes = 0; + maxX = 0.0f; + maxY = 0.0f; + for(j = 0; j < 12; j++){ + k = i*12 + j; + if(InfoForTileCars[k].type == NodeTypeExtern){ + numExtern++; + if(InfoForTileCars[k].numLeftLanes + InfoForTileCars[k].numRightLanes > numLanes) + numLanes = InfoForTileCars[k].numLeftLanes + InfoForTileCars[k].numRightLanes; + maxX = max(maxX, fabs(InfoForTileCars[k].x)); + maxY = max(maxY, fabs(InfoForTileCars[k].y)); + }else if(InfoForTileCars[k].type == NodeTypeIntern) + numIntern++; + } + + if(numIntern == 1 && numExtern == 2){ + if(numLanes < 4){ + if((i & 7) == 4){ // WHAT? + m_objectFlags[i] |= 1; + if(maxX > maxY) + m_objectFlags[i] |= 2; + else + m_objectFlags[i] &= ~2; + } + }else{ + m_objectFlags[i] |= 1; + if(maxX > maxY) + m_objectFlags[i] |= 2; + else + m_objectFlags[i] &= ~2; + } + } + } + + delete[] tempNodes; + + CountFloodFillGroups(PathTypeCar); + CountFloodFillGroups(PathTypePed); + + delete[] InfoForTileCars; + InfoForTileCars = nil; + delete[] InfoForTilePeds; + InfoForTilePeds = nil; + delete[] DetachedNodesCars; + DetachedNodesCars = nil; + delete[] DetachedNodesPeds; + DetachedNodesPeds = nil; + } + printf("Done with PreparePathData\n"); +} + +/* String together connected nodes in a list by a flood fill algorithm */ +void +CPathFind::CountFloodFillGroups(uint8 type) +{ + int start, end; + int i, l; + uint16 n; + CPathNode *node, *prev; + + switch(type){ + case PathTypeCar: + start = 0; + end = m_numCarPathNodes; + break; + case PathTypePed: + start = m_numCarPathNodes; + end = start + m_numPedPathNodes; + break; + } + + for(i = start; i < end; i++) + m_pathNodes[i].group = 0; + + n = 0; + for(;;){ + n++; + if(n > 1500){ + for(i = start; m_pathNodes[i].group && i < end; i++); + printf("NumNodes:%d Accounted for:%d\n", end - start, i - start); + } + + // Look for unvisited node + for(i = start; m_pathNodes[i].group && i < end; i++); + if(i == end) + break; + + node = &m_pathNodes[i]; + node->next = nil; + node->group = n; + + if(node->numLinks == 0){ + if(type == PathTypeCar) + printf("Single car node: %f %f %f (%d)\n", + node->pos.x, node->pos.y, node->pos.z, + m_mapObjects[node->objectIndex]->m_modelIndex); + else + printf("Single ped node: %f %f %f\n", + node->pos.x, node->pos.y, node->pos.z); + } + + while(node){ + prev = node; + node = node->next; + for(i = 0; i < prev->numLinks; i++){ + l = m_linkTo[prev->firstLink + i]; + if(m_pathNodes[l].group == 0){ + m_pathNodes[l].group = n; + if(m_pathNodes[l].group == 0) + m_pathNodes[l].group = 0x80; // ??? + m_pathNodes[l].next = node; + node = &m_pathNodes[l]; + } + } + } + } + + m_numGroups[type] = n-1; + printf("GraphType:%d. FloodFill groups:%d\n", type, n); +} + +void +CPathFind::PreparePathDataForType(uint8 type, CTempNode *tempnodes, CPathInfoForObject *objectpathinfo, + float maxdist, CTempDetachedNode *detachednodes, int unused) +{ + static CVector CoorsXFormed; + int i, j, k, l; + int l1, l2; + int start, typeoff; + float posx, posy; + float dx, dy, mag; + float nearestDist; + int nearestId; + int next; + int oldNumPathNodes, oldNumLinks; + CVector dist; + int iseg, jseg; + int istart, jstart; + int done, cont; + + typeoff = 12*type; + oldNumPathNodes = m_numPathNodes; + oldNumLinks = m_numLinks; + + // Initialize map objects + for(i = 0; i < m_numMapObjects; i++) + for(j = 0; j < 12; j++) + m_mapObjects[i]->m_nodeIndicesCars[typeoff + j] = -1; + + // Calculate internal nodes, store them and connect them to defining object + for(i = 0; i < m_numMapObjects; i++){ + start = 12*m_mapObjects[i]->m_modelIndex; + for(j = 0; j < 12; j++){ + if(objectpathinfo[start + j].type != NodeTypeIntern) + continue; + CalcNodeCoors( + objectpathinfo[start + j].x, + objectpathinfo[start + j].y, + objectpathinfo[start + j].z, + i, + &CoorsXFormed); + m_pathNodes[m_numPathNodes].pos = CoorsXFormed; + m_pathNodes[m_numPathNodes].objectIndex = i; + m_pathNodes[m_numPathNodes].flags |= 1; + m_mapObjects[i]->m_nodeIndicesCars[typeoff + j] = m_numPathNodes++; + } + } + + // Insert external nodes into TempList + TempListLength = 0; + for(i = 0; i < m_numMapObjects; i++){ + start = 12*m_mapObjects[i]->m_modelIndex; + + for(j = 0; j < 12; j++){ + if(objectpathinfo[start + j].type != NodeTypeExtern) + continue; + CalcNodeCoors( + objectpathinfo[start + j].x, + objectpathinfo[start + j].y, + objectpathinfo[start + j].z, + i, + &CoorsXFormed); + + // find closest unconnected node + nearestId = -1; + nearestDist = maxdist; + for(k = 0; k < TempListLength; k++){ + if(tempnodes[k].linkState != 1) + continue; + dx = tempnodes[k].pos.x - CoorsXFormed.x; + if(fabs(dx) < nearestDist){ + dy = tempnodes[k].pos.y - CoorsXFormed.y; + if(fabs(dy) < nearestDist){ + nearestDist = max(fabs(dx), fabs(dy)); + nearestId = k; + } + } + } + + if(nearestId < 0){ + // None found, add this one to temp list + tempnodes[TempListLength].pos = CoorsXFormed; + next = objectpathinfo[start + j].next; + if(next < 0){ + // no link from this node, find link to this node + next = 0; + for(k = start; j != objectpathinfo[k].next; k++) + next++; + } + // link to connecting internal node + tempnodes[TempListLength].link1 = m_mapObjects[i]->m_nodeIndicesCars[typeoff + next]; + if(type == PathTypeCar){ + tempnodes[TempListLength].numLeftLanes = objectpathinfo[start + j].numLeftLanes; + tempnodes[TempListLength].numRightLanes = objectpathinfo[start + j].numRightLanes; + } + tempnodes[TempListLength++].linkState = 1; + }else{ + // Found nearest, connect it to our neighbour + next = objectpathinfo[start + j].next; + if(next < 0){ + // no link from this node, find link to this node + next = 0; + for(k = start; j != objectpathinfo[k].next; k++) + next++; + } + tempnodes[nearestId].link2 = m_mapObjects[i]->m_nodeIndicesCars[typeoff + next]; + tempnodes[nearestId].linkState = 2; + + // collapse this node with nearest we found + dx = m_pathNodes[tempnodes[nearestId].link1].pos.x - m_pathNodes[tempnodes[nearestId].link2].pos.x; + dy = m_pathNodes[tempnodes[nearestId].link1].pos.y - m_pathNodes[tempnodes[nearestId].link2].pos.y; + tempnodes[nearestId].pos.x = (tempnodes[nearestId].pos.x + CoorsXFormed.x)*0.5f; + tempnodes[nearestId].pos.y = (tempnodes[nearestId].pos.y + CoorsXFormed.y)*0.5f; + tempnodes[nearestId].pos.z = (tempnodes[nearestId].pos.z + CoorsXFormed.z)*0.5f; + mag = sqrt(dx*dx + dy*dy); + tempnodes[nearestId].dirX = dx/mag; + tempnodes[nearestId].dirY = dy/mag; + // do something when number of lanes doesn't agree + if(type == PathTypeCar) + if(tempnodes[nearestId].numLeftLanes != 0 && tempnodes[nearestId].numRightLanes != 0 && + (objectpathinfo[start + j].numLeftLanes == 0 || objectpathinfo[start + j].numRightLanes == 0)){ + tempnodes[nearestId].numLeftLanes = objectpathinfo[start + j].numLeftLanes; + tempnodes[nearestId].numRightLanes = objectpathinfo[start + j].numRightLanes; + } + } + } + } + + // Loop through previously added internal nodes and link them + for(i = oldNumPathNodes; i < m_numPathNodes; i++){ + // Init link + m_pathNodes[i].numLinks = 0; + m_pathNodes[i].firstLink = m_numLinks; + + // See if node connects to external nodes + for(j = 0; j < TempListLength; j++){ + if(tempnodes[j].linkState != 2) + continue; + + // Add link to other side of the external + if(tempnodes[j].link1 == i) + m_linkTo[m_numLinks] = tempnodes[j].link2; + else if(tempnodes[j].link2 == i) + m_linkTo[m_numLinks] = tempnodes[j].link1; + else + continue; + + dist = m_pathNodes[i].pos - m_pathNodes[m_linkTo[m_numLinks]].pos; + m_distTo[m_numLinks] = dist.Magnitude(); + m_linkFlags[m_numLinks] = 0; + + if(type == PathTypeCar){ + // IMPROVE: use a goto here + // Find existing navi node + for(k = 0; k < m_numNaviNodes; k++){ + if(m_naviNodes[k].dirX == tempnodes[j].dirX && + m_naviNodes[k].dirY == tempnodes[j].dirY && + m_naviNodes[k].posX == tempnodes[j].pos.x && + m_naviNodes[k].posY == tempnodes[j].pos.y){ + m_naviNodeLinks[m_numLinks] = k; + k = m_numNaviNodes; + } + } + // k is m_numNaviNodes+1 if we found one + if(k == m_numNaviNodes){ + m_naviNodes[m_numNaviNodes].dirX = tempnodes[j].dirX; + m_naviNodes[m_numNaviNodes].dirY = tempnodes[j].dirY; + m_naviNodes[m_numNaviNodes].posX = tempnodes[j].pos.x; + m_naviNodes[m_numNaviNodes].posY = tempnodes[j].pos.y; + m_naviNodes[m_numNaviNodes].pathNodeIndex = i; + m_naviNodes[m_numNaviNodes].numLeftLanes = tempnodes[j].numLeftLanes; + m_naviNodes[m_numNaviNodes].numRightLanes = tempnodes[j].numRightLanes; + m_naviNodes[m_numNaviNodes].trafficLightType = 0; + m_naviNodeLinks[m_numLinks] = m_numNaviNodes++; + } + } + + m_pathNodes[i].numLinks++; + m_numLinks++; + } + + // Find i inside path segment + iseg = 0; + for(j = max(oldNumPathNodes, i-12); j < i; j++) + if(m_pathNodes[j].objectIndex == m_pathNodes[i].objectIndex) + iseg++; + + istart = 12*m_mapObjects[m_pathNodes[i].objectIndex]->m_modelIndex; + // Add links to other internal nodes + for(j = max(oldNumPathNodes, i-12); j < min(m_numPathNodes, i+12); j++){ + if(m_pathNodes[i].objectIndex != m_pathNodes[j].objectIndex || i == j) + continue; + // N.B.: in every path segment, the externals have to be at the end + jseg = j-i + iseg; + + jstart = 12*m_mapObjects[m_pathNodes[j].objectIndex]->m_modelIndex; + if(objectpathinfo[istart + iseg].next == jseg || + objectpathinfo[jstart + jseg].next == iseg){ + // Found a link between i and j + m_linkTo[m_numLinks] = j; + dist = m_pathNodes[i].pos - m_pathNodes[j].pos; + m_distTo[m_numLinks] = dist.Magnitude(); + + if(type == PathTypeCar){ + posx = (m_pathNodes[i].pos.x + m_pathNodes[j].pos.x)*0.5f; + posy = (m_pathNodes[i].pos.y + m_pathNodes[j].pos.y)*0.5f; + dx = m_pathNodes[j].pos.x - m_pathNodes[i].pos.x; + dy = m_pathNodes[j].pos.y - m_pathNodes[i].pos.y; + mag = sqrt(dx*dx + dy*dy); + dx /= mag; + dy /= mag; + if(i < j){ + dx = -dx; + dy = -dy; + } + // IMPROVE: use a goto here + // Find existing navi node + for(k = 0; k < m_numNaviNodes; k++){ + if(m_naviNodes[k].dirX == dx && + m_naviNodes[k].dirY == dy && + m_naviNodes[k].posX == posx && + m_naviNodes[k].posY == posy){ + m_naviNodeLinks[m_numLinks] = k; + k = m_numNaviNodes; + } + } + // k is m_numNaviNodes+1 if we found one + if(k == m_numNaviNodes){ + m_naviNodes[m_numNaviNodes].dirX = dx; + m_naviNodes[m_numNaviNodes].dirY = dy; + m_naviNodes[m_numNaviNodes].posX = posx; + m_naviNodes[m_numNaviNodes].posY = posy; + m_naviNodes[m_numNaviNodes].pathNodeIndex = i; + m_naviNodes[m_numNaviNodes].numLeftLanes = -1; + m_naviNodes[m_numNaviNodes].numRightLanes = -1; + m_naviNodes[m_numNaviNodes].trafficLightType = 0; + m_naviNodeLinks[m_numLinks] = m_numNaviNodes++; + } + }else{ + // Crosses road + if(objectpathinfo[istart + iseg].next == jseg && objectpathinfo[istart + iseg].flag & 1 || + objectpathinfo[jstart + jseg].next == iseg && objectpathinfo[jstart + jseg].flag & 1) + m_linkFlags[m_numLinks] |= 1; + else + m_linkFlags[m_numLinks] &= ~1; + } + + m_pathNodes[i].numLinks++; + m_numLinks++; + } + } + } + + if(type == PathTypeCar){ + done = 0; + // Set number of lanes for all nodes somehow + // very strange code + for(k = 0; !done && k < 10; k++){ + done = 1; + for(i = 0; i < m_numPathNodes; i++){ + if(m_pathNodes[i].numLinks != 2) + continue; + l1 = m_naviNodeLinks[m_pathNodes[i].firstLink]; + l2 = m_naviNodeLinks[m_pathNodes[i].firstLink+1]; + + if(m_naviNodes[l1].numLeftLanes == -1 && + m_naviNodes[l2].numLeftLanes != -1){ + done = 0; + if(m_naviNodes[l2].pathNodeIndex == i){ + // why switch left and right here? + m_naviNodes[l1].numLeftLanes = m_naviNodes[l2].numRightLanes; + m_naviNodes[l1].numRightLanes = m_naviNodes[l2].numLeftLanes; + }else{ + m_naviNodes[l1].numLeftLanes = m_naviNodes[l2].numLeftLanes; + m_naviNodes[l1].numRightLanes = m_naviNodes[l2].numRightLanes; + } + m_naviNodes[l1].pathNodeIndex = i; + }else if(m_naviNodes[l1].numLeftLanes != -1 && + m_naviNodes[l2].numLeftLanes == -1){ + done = 0; + if(m_naviNodes[l1].pathNodeIndex == i){ + // why switch left and right here? + m_naviNodes[l2].numLeftLanes = m_naviNodes[l1].numRightLanes; + m_naviNodes[l2].numRightLanes = m_naviNodes[l1].numLeftLanes; + }else{ + m_naviNodes[l2].numLeftLanes = m_naviNodes[l1].numLeftLanes; + m_naviNodes[l2].numRightLanes = m_naviNodes[l1].numRightLanes; + } + m_naviNodes[l2].pathNodeIndex = i; + }else if(m_naviNodes[l1].numLeftLanes == -1 && + m_naviNodes[l2].numLeftLanes == -1) + done = 0; + } + } + + // Fall back to default values for number of lanes + for(i = 0; i < m_numPathNodes; i++) + for(j = 0; j < m_pathNodes[i].numLinks; j++){ + k = m_naviNodeLinks[m_pathNodes[i].firstLink + j]; + if(m_naviNodes[k].numLeftLanes < 0) + m_naviNodes[k].numLeftLanes = 1; + if(m_naviNodes[k].numRightLanes < 0) + m_naviNodes[k].numRightLanes = 1; + } + } + + // Set flags for car nodes + if(type == PathTypeCar){ + do{ + cont = 0; + for(i = 0; i < m_numPathNodes; i++){ + m_pathNodes[i].flags &= ~PathNodeDisabled; + m_pathNodes[i].flags &= ~PathNodeBetweenLevels; + // See if node is a dead end, if so, we're not done yet + if((m_pathNodes[i].flags & PathNodeDeadEnd) == 0){ + k = 0; + for(j = 0; j < m_pathNodes[i].numLinks; j++) + if((m_pathNodes[m_linkTo[m_pathNodes[i].firstLink + j]].flags & PathNodeDeadEnd) == 0) + k++; + if(k < 2){ + m_pathNodes[i].flags |= PathNodeDeadEnd; + cont = 1; + } + } + } + }while(cont); + } + + // Remove isolated ped nodes + if(type == PathTypePed) + for(i = oldNumPathNodes; i < m_numPathNodes; i++){ + if(m_pathNodes[i].numLinks != 0) + continue; + + // Remove node + for(j = i; j < m_numPathNodes-1; j++) + m_pathNodes[j] = m_pathNodes[j+1]; + + // Fix links + for(j = oldNumLinks; j < m_numLinks; j++) + if(m_linkTo[j] >= i) + m_linkTo[j]--; + + // Also in treadables + for(j = 0; j < m_numMapObjects; j++) + for(k = 0; k < 12; k++){ + if(m_mapObjects[j]->m_nodeIndicesPeds[k] == i){ + // remove this one + for(l = k; l < 12-1; l++) + m_mapObjects[j]->m_nodeIndicesPeds[l] = m_mapObjects[j]->m_nodeIndicesPeds[l+1]; + m_mapObjects[j]->m_nodeIndicesPeds[11] = -1; + }else if(m_mapObjects[j]->m_nodeIndicesPeds[k] > i) + m_mapObjects[j]->m_nodeIndicesPeds[k]--; + } + + i--; + m_numPathNodes--; + } +} + +void +CPathFind::CalcNodeCoors(int16 x, int16 y, int16 z, int id, CVector *out) +{ + CVector pos; + pos.x = x / 16.0f; + pos.y = y / 16.0f; + pos.z = z / 16.0f; + *out = m_mapObjects[id]->GetMatrix() * pos; +} + +STARTPATCHES + InjectHook(0x429610, &CPathFind::PreparePathData, PATCH_JUMP); + InjectHook(0x429C20, &CPathFind::PreparePathDataForType, PATCH_JUMP); +ENDPATCHES |