2 files changed, 264 insertions, 9 deletions

diff --git a/src/render/Skidmarks.cpp b/src/render/Skidmarks.cpp
index c2725ed6..41ee5d1d 100644
--- a/src/render/Skidmarks.cpp
+++ b/src/render/Skidmarks.cpp
@@ -1,12 +1,247 @@
 #include "common.h"
 #include "patcher.h"
+#include "main.h"
+#include "TxdStore.h"
+#include "Timer.h"
+#include "Replay.h"
 #include "Skidmarks.h"
 
-WRAPPER void CSkidmarks::Clear(void) { EAXJMP(0x518130); }
-WRAPPER void CSkidmarks::Update() { EAXJMP(0x518200); }
+CSkidmark CSkidmarks::aSkidmarks[NUMSKIDMARKS];
 
-WRAPPER void CSkidmarks::Render(void) { EAXJMP(0x5182E0); }
-WRAPPER void CSkidmarks::RegisterOne(uint32 id, CVector pos, float fwdx, float fwdY, bool *isMuddy, bool *isBloddy) { EAXJMP(0x5185C0); }
+RwImVertexIndex SkidmarkIndexList[SKIDMARK_LENGTH * 6];
+RwIm3DVertex SkidmarkVertices[SKIDMARK_LENGTH * 2];
+RwTexture *gpSkidTex;
+RwTexture *gpSkidBloodTex;
+RwTexture *gpSkidMudTex;
 
-WRAPPER void CSkidmarks::Init(void) { EAXJMP(0x517D70); }
-WRAPPER void CSkidmarks::Shutdown(void) { EAXJMP(0x518100); }
+void
+CSkidmarks::Init(void)
+{
+	int i, ix, slot;
+	CTxdStore::PushCurrentTxd();
+	slot = CTxdStore::FindTxdSlot("particle");
+	CTxdStore::SetCurrentTxd(slot);
+	gpSkidTex = RwTextureRead("particleskid", nil);
+	gpSkidBloodTex = RwTextureRead("particleskidblood", nil);
+	gpSkidMudTex = RwTextureRead("particleskidmud", nil);
+	CTxdStore::PopCurrentTxd();
+
+	for(i = 0; i < NUMSKIDMARKS; i++){
+		aSkidmarks[i].m_state = 0;
+		aSkidmarks[i].m_wasUpdated = false;
+	}
+
+	ix = 0;
+	for(i = 0; i < SKIDMARK_LENGTH; i++){
+		SkidmarkIndexList[i*6+0] = ix+0;
+		SkidmarkIndexList[i*6+1] = ix+2;
+		SkidmarkIndexList[i*6+2] = ix+1;
+		SkidmarkIndexList[i*6+3] = ix+1;
+		SkidmarkIndexList[i*6+4] = ix+2;
+		SkidmarkIndexList[i*6+5] = ix+3;
+		ix += 2;
+	}
+
+	for(i = 0; i < SKIDMARK_LENGTH; i++){
+		RwIm3DVertexSetU(&SkidmarkVertices[i*2 + 0], 0.0f);
+		RwIm3DVertexSetV(&SkidmarkVertices[i*2 + 0], i*5.01f);
+		RwIm3DVertexSetU(&SkidmarkVertices[i*2 + 1], 1.0f);
+		RwIm3DVertexSetV(&SkidmarkVertices[i*2 + 1], i*5.01f);
+	}
+}
+
+void
+CSkidmarks::Shutdown(void)
+{
+	RwTextureDestroy(gpSkidTex);
+	RwTextureDestroy(gpSkidBloodTex);
+	RwTextureDestroy(gpSkidMudTex);
+}
+
+void
+CSkidmarks::Clear(void)
+{
+	int i;
+	for(i = 0; i < NUMSKIDMARKS; i++){
+		aSkidmarks[i].m_state = 0;
+		aSkidmarks[i].m_wasUpdated = false;
+	}
+}
+
+void
+CSkidmarks::Update(void)
+{
+	int i;
+	uint32 t1 = CTimer::GetTimeInMilliseconds() + 2500;
+	uint32 t2 = CTimer::GetTimeInMilliseconds() + 5000;
+	uint32 t3 = CTimer::GetTimeInMilliseconds() + 10000;
+	uint32 t4 = CTimer::GetTimeInMilliseconds() + 20000;
+	for(i = 0; i < NUMSKIDMARKS; i++){
+		switch(aSkidmarks[i].m_state){
+		case 1:
+			if(!aSkidmarks[i].m_wasUpdated){
+				// Didn't continue this one last time, so finish it and set fade times
+				aSkidmarks[i].m_state = 2;
+				if(aSkidmarks[i].m_last < 4){
+					aSkidmarks[i].m_fadeStart = t1;
+					aSkidmarks[i].m_fadeEnd = t2;
+				}else if(aSkidmarks[i].m_last < 9){
+					aSkidmarks[i].m_fadeStart = t2;
+					aSkidmarks[i].m_fadeEnd = t3;
+				}else{
+					aSkidmarks[i].m_fadeStart = t3;
+					aSkidmarks[i].m_fadeEnd = t4;
+				}
+			}
+			break;
+		case 2:
+			if(CTimer::GetTimeInMilliseconds() > aSkidmarks[i].m_fadeEnd)
+				aSkidmarks[i].m_state = 0;
+			break;
+		}
+		aSkidmarks[i].m_wasUpdated = false;
+	}
+}
+
+void
+CSkidmarks::Render(void)
+{
+	int i, j;
+	RwTexture *lastTex = nil;
+
+	RwRenderStateSet(rwRENDERSTATEZWRITEENABLE, (void*)FALSE);
+	RwRenderStateSet(rwRENDERSTATEVERTEXALPHAENABLE, (void*)TRUE);
+	RwRenderStateSet(rwRENDERSTATESRCBLEND, (void*)rwBLENDSRCALPHA);
+	RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDINVSRCALPHA);
+
+	for(i = 0; i < NUMSKIDMARKS; i++){
+		if(aSkidmarks[i].m_state == 0 || aSkidmarks[i].m_last < 1)
+			continue;
+
+		if(aSkidmarks[i].m_isBloody){
+			if(lastTex != gpSkidBloodTex){
+				RwRenderStateSet(rwRENDERSTATETEXTURERASTER, RwTextureGetRaster(gpSkidBloodTex));
+				lastTex = gpSkidBloodTex;
+			}
+		}else if(aSkidmarks[i].m_isMuddy){
+			if(lastTex != gpSkidMudTex){
+				RwRenderStateSet(rwRENDERSTATETEXTURERASTER, RwTextureGetRaster(gpSkidMudTex));
+				lastTex = gpSkidMudTex;
+			}
+		}else{
+			if(lastTex != gpSkidTex){
+				RwRenderStateSet(rwRENDERSTATETEXTURERASTER, RwTextureGetRaster(gpSkidTex));
+				lastTex = gpSkidTex;
+			}
+		}
+
+		uint32 fade, alpha;
+		if(aSkidmarks[i].m_state == 1 || CTimer::GetTimeInMilliseconds() < aSkidmarks[i].m_fadeStart)
+			fade = 255;
+		else
+			fade = 255*(aSkidmarks[i].m_fadeEnd - CTimer::GetTimeInMilliseconds()) / (aSkidmarks[i].m_fadeEnd - aSkidmarks[i].m_fadeStart);
+
+		for(j = 0; j <= aSkidmarks[i].m_last; j++){
+			alpha = 128;
+			if(j == 0 || j == aSkidmarks[i].m_last && aSkidmarks[i].m_state == 2)
+				alpha = 0;
+			alpha = alpha*fade/256;
+
+			CVector p1 = aSkidmarks[i].m_pos[j] + aSkidmarks[i].m_side[j];
+			CVector p2 = aSkidmarks[i].m_pos[j] - aSkidmarks[i].m_side[j];
+			RwIm3DVertexSetRGBA(&SkidmarkVertices[j*2+0], 255, 255, 255, alpha);
+			RwIm3DVertexSetPos(&SkidmarkVertices[j*2+0], p1.x, p1.y, p1.z+0.1f);
+			RwIm3DVertexSetRGBA(&SkidmarkVertices[j*2+1], 255, 255, 255, alpha);
+			RwIm3DVertexSetPos(&SkidmarkVertices[j*2+1], p2.x, p2.y, p2.z+0.1f);
+		}
+
+		LittleTest();
+		if(RwIm3DTransform(SkidmarkVertices, 2*(aSkidmarks[i].m_last+1), nil, rwIM3D_VERTEXUV)){
+			RwIm3DRenderIndexedPrimitive(rwPRIMTYPETRILIST, SkidmarkIndexList, 6*aSkidmarks[i].m_last);
+			RwIm3DEnd();
+		}
+	}
+
+	RwRenderStateSet(rwRENDERSTATEVERTEXALPHAENABLE, (void*)FALSE);
+	RwRenderStateSet(rwRENDERSTATEZWRITEENABLE, (void*)TRUE);
+	RwRenderStateSet(rwRENDERSTATEZTESTENABLE, (void*)TRUE);
+}
+
+void
+CSkidmarks::RegisterOne(uintptr id, CVector pos, float fwdX, float fwdY, bool *isMuddy, bool *isBloody)
+{
+	int i;
+	CVector2D fwd(fwdX, fwdY);
+
+	if(CReplay::IsPlayingBack())
+		return;
+
+	// Find a skidmark to continue
+	for(i = 0; i < NUMSKIDMARKS; i++)
+		if(aSkidmarks[i].m_state == 1 && aSkidmarks[i].m_id == id)
+			break;
+
+	if(i < NUMSKIDMARKS){
+		// Continue this one
+
+		if(aSkidmarks[i].m_isBloody != *isBloody){
+			// Blood-status changed, end this one
+			aSkidmarks[i].m_state = 2;
+			aSkidmarks[i].m_fadeStart = CTimer::GetTimeInMilliseconds() + 10000;
+			aSkidmarks[i].m_fadeEnd = CTimer::GetTimeInMilliseconds() + 20000;
+			return;
+		}
+
+		aSkidmarks[i].m_wasUpdated = true;
+
+		if(CTimer::GetTimeInMilliseconds() - aSkidmarks[i].m_lastUpdate <= 100){
+			// Last update was recently, just change last coords
+			aSkidmarks[i].m_pos[aSkidmarks[i].m_last] = pos;
+			return;
+		}
+		aSkidmarks[i].m_lastUpdate = CTimer::GetTimeInMilliseconds();
+
+		if(aSkidmarks[i].m_last >= SKIDMARK_LENGTH-1){
+			// No space to continue, end it
+			aSkidmarks[i].m_state = 2;
+			aSkidmarks[i].m_fadeStart = CTimer::GetTimeInMilliseconds() + 10000;
+			aSkidmarks[i].m_fadeEnd = CTimer::GetTimeInMilliseconds() + 20000;
+			*isBloody = false;	// stpo blood marks at end
+			return;
+		}
+		aSkidmarks[i].m_last++;
+
+		aSkidmarks[i].m_pos[aSkidmarks[i].m_last] = pos;
+
+		CVector2D dist = aSkidmarks[i].m_pos[aSkidmarks[i].m_last] - aSkidmarks[i].m_pos[aSkidmarks[i].m_last-1];
+		dist.Normalise();
+		CVector2D right(dist.y, -dist.x);
+		float turn = DotProduct2D(fwd, right);
+		turn = Abs(turn) + 1.0f;
+		aSkidmarks[i].m_side[aSkidmarks[i].m_last] = CVector(right.x, right.y, 0.0f) * turn * 0.125f;
+		if(aSkidmarks[i].m_last == 1)
+			aSkidmarks[i].m_side[0] = aSkidmarks[i].m_side[1];
+
+		if(aSkidmarks[i].m_last > 8)
+			*isBloody = false;	// stop blood marks after 8
+		return;
+	}
+
+	// Start a new one
+	for(i = 0; i < NUMSKIDMARKS; i++)
+		if(aSkidmarks[i].m_state == 0)
+			break;
+	if(i < NUMSKIDMARKS){
+		// Found a free slot
+		aSkidmarks[i].m_state = 1;
+		aSkidmarks[i].m_id = id;
+		aSkidmarks[i].m_pos[0] = pos;
+		aSkidmarks[i].m_side[0] = CVector(0.0f, 0.0f, 0.0f);
+		aSkidmarks[i].m_wasUpdated = true;
+		aSkidmarks[i].m_last = 0;
+		aSkidmarks[i].m_lastUpdate = CTimer::GetTimeInMilliseconds() - 1000;
+		aSkidmarks[i].m_isBloody = *isBloody;
+		aSkidmarks[i].m_isMuddy = *isMuddy;
+	}else
+		*isBloody = false;	// stop blood marks if no space
+}
diff --git a/src/render/Skidmarks.h b/src/render/Skidmarks.h
index bf2da7e4..085b4c6d 100644
--- a/src/render/Skidmarks.h
+++ b/src/render/Skidmarks.h
@@ -1,12 +1,32 @@
 #pragma once
 
+enum { SKIDMARK_LENGTH = 16 };
+
+class CSkidmark
+{
+public:
+	uint8 m_state;
+	bool m_wasUpdated;
+	bool m_isBloody;
+	bool m_isMuddy;
+	uintptr m_id;
+	int16 m_last;
+	uint32 m_lastUpdate;;
+	uint32 m_fadeStart;
+	uint32 m_fadeEnd;
+	CVector m_pos[SKIDMARK_LENGTH];
+	CVector m_side[SKIDMARK_LENGTH];
+};
+
 class CSkidmarks
 {
+	static CSkidmark aSkidmarks[NUMSKIDMARKS];
 public:
+
+	static void Init(void);
+	static void Shutdown(void);
 	static void Clear(void);
 	static void Update(void);
 	static void Render(void);
-	static void RegisterOne(uint32 id, CVector pos, float fwdx, float fwdY, bool *isMuddy, bool *isBloddy);
-	static void Init(void);
-	static void Shutdown(void);
+	static void RegisterOne(uintptr id, CVector pos, float fwdX, float fwdY, bool *isMuddy, bool *isBloody);
 };