3 files changed, 169 insertions, 0 deletions

diff --git a/src/render/Fluff.cpp b/src/render/Fluff.cpp
index 1056d6ff..00267e30 100644
--- a/src/render/Fluff.cpp
+++ b/src/render/Fluff.cpp
@@ -13,6 +13,7 @@
 #include "Stats.h"
 #include "maths.h"
 #include "Frontend.h"
+#include "SmokeTrails.h"
 
 uint8 ScrollCharSet[59][5] = {
 	{ 0x00, 0x00, 0x00, 0x00, 0x00 }, // ' '
@@ -99,6 +100,8 @@ CMovingThing CMovingThings::aMovingThings[NUMMOVINGTHINGS];
  
 void CMovingThings::Init()
 {
+	CSmokeTrails::Init();
+
 	StartCloseList.m_pNext = &CMovingThings::EndCloseList;
 	StartCloseList.m_pPrev = nil;
 	EndCloseList.m_pNext = nil;
@@ -189,6 +192,8 @@ void CMovingThings::Update()
 
 void CMovingThings::Render()
 {
+	CSmokeTrails::Update();
+
 	int i;
 	for (i = 0; i < 11; ++i)
 	{
@@ -205,6 +210,8 @@ void CMovingThings::Render()
 		if (aDigitalClocks[i].IsVisible())
 			aDigitalClocks[i].Render();
 	}
+
+	CSmokeTrails::Render();
 }
 
 // ---------- CMovingThing ----------
diff --git a/src/render/SmokeTrails.cpp b/src/render/SmokeTrails.cpp
new file mode 100644
index 00000000..3913c806
--- /dev/null
+++ b/src/render/SmokeTrails.cpp
@@ -0,0 +1,139 @@
+#include "common.h"
+#include "SmokeTrails.h"
+#include "Camera.h"
+#include "World.h"
+#include "CutsceneMgr.h"
+#include "PlayerPed.h"
+#include "Entity.h"
+#include "rpworld.h"
+#include "Bones.h"
+#include "Timer.h"
+#include "Weather.h"
+
+bool CSmokeTrails::CigOn = false;
+CSmokeTrail CSmokeTrails::aSmoke[3];
+
+extern RwImVertexIndex SmokeTrailIndices[32] = { 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
+9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16 };
+
+float RandomSmoke[16] = { 10.0f, 5.0f, -1.0f, -9.0f, -7.0f, -1.0f, 0.0f, 3.0f, 6.0f, 7.0f, 4.0f, 2.0f,
+5.0f, 7.0f };
+
+
+void
+CSmokeTrail::RegisterPoint(CVector regPosition, float opacity) {
+	bool bShifted = false;
+
+	if (m_time[0] && CTimer::GetTimeInMilliseconds() - m_time[0] > 150) {
+		bShifted = true;
+		for (int32 i = 15; i > 0; i--) {
+			m_pos[i] = m_pos[i - 1];
+			m_time[i] = m_time[i - 1];
+			m_density[i] = m_density[i - 1];
+		}
+		++m_seed;
+	}
+	m_pos[0] = regPosition;
+
+	if (bShifted || !m_time[0]) {
+		m_time[0] = CTimer::GetTimeInMilliseconds();
+		float currentDensity = 0.1f / (m_pos[1] - m_pos[2]).Magnitude();
+		m_density[1] = opacity * Min(currentDensity, 1.0f);
+	}
+	m_density[0] = 0.0f;
+}
+
+void
+CSmokeTrail::Init(int num) {
+	for (int32 i = 0; i < 16; i++) 
+		m_time[i] = 0;
+	m_seed = num * 2;
+}
+
+void
+CSmokeTrails::Init(void) {
+	for(int32 i = 0; i < 3; i++)
+		aSmoke[i].Init(i);
+}
+
+void
+CSmokeTrails::Render(void) {
+	for (int32 i = 0; i < 3; i++)
+		aSmoke[i].Render();
+}
+
+void 
+CSmokeTrail::Render(void) {
+	int numVerts = 0;
+	RwIm3DVertex TempVertexBuffer[16];
+
+	if (TheCamera.IsSphereVisible(m_pos[0], 10.0f)) {
+		for (int32 i = 0; i < 16; i++) {
+			int timeSinceSpawned = CTimer::GetTimeInMilliseconds() - m_time[i];
+			
+			if (timeSinceSpawned > 2250)
+				m_time[i] = 0;
+			
+			if (m_time[i]) {
+				int alpha = (1.0f - timeSinceSpawned / 2250.0f) * 110.0f * m_density[i];
+				float offset = timeSinceSpawned * CWeather::Wind * 0.000099f;
+				float currentX = (m_pos[i].x + timeSinceSpawned * RandomSmoke[(i - m_seed) & 0xF] * 0.0000099f) - offset;
+				float currentY = (m_pos[i].y + timeSinceSpawned * RandomSmoke[(i - m_seed + 5) & 0xF] * 0.0000099f) - offset;
+				float currentZ = m_pos[i].z + timeSinceSpawned * 0.00039f;
+				RwIm3DVertexSetRGBA(&TempVertexBuffer[i], 200, 200, 200, alpha);
+				RwIm3DVertexSetPos(&TempVertexBuffer[i], currentX, currentY, currentZ);
+				numVerts++;
+			}
+		}
+	}
+	
+	if (numVerts > 1) {
+		RwRenderStateSet(rwRENDERSTATEVERTEXALPHAENABLE, (void*)TRUE);
+		RwRenderStateSet(rwRENDERSTATESRCBLEND, (void*)rwBLENDSRCALPHA);
+		RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDINVSRCALPHA);
+		RwRenderStateSet(rwRENDERSTATETEXTURERASTER, nil);
+
+		if (RwIm3DTransform(TempVertexBuffer, numVerts, nil, rwIM3D_VERTEXXYZ | rwIM3D_VERTEXRGBA)) {
+			RwIm3DRenderIndexedPrimitive(rwPRIMTYPEPOLYLINE, SmokeTrailIndices, 2*(numVerts - 1));
+			RwIm3DEnd();
+		}
+	}
+}
+
+void
+CSmokeTrails::Update(void) {
+
+	if (!CSmokeTrails::CigOn || TheCamera.Using1stPersonWeaponMode() || !FindPlayerPed() ||
+		FindPlayerVehicle() || CCutsceneMgr::IsRunning() || !FindPlayerPed()->GetClump())
+		return;
+
+	RwV3d startPos = {0.026f, 0.15f, 0.02f};
+	RwV3d endPos = {0.026f, 0.05f, 0.02f};
+
+	RpHAnimHierarchy *hier = GetAnimHierarchyFromSkinClump(FindPlayerPed()->GetClump());
+	int32 idx = RpHAnimIDGetIndex(hier, ConvertPedNode2BoneTag(PED_HEAD));
+	RwMatrix *head = &RpHAnimHierarchyGetMatrixArray(hier)[idx];
+	RwV3dTransformPoints(&startPos, &startPos, 1, head);
+	RwV3dTransformPoints(&endPos, &endPos, 1, head);
+
+	aSmoke[0].RegisterPoint(startPos, 1.0f);
+	aSmoke[1].RegisterPoint(startPos, 0.75f);
+	aSmoke[2].RegisterPoint(startPos, 0.5f); 
+
+	RwRenderStateSet(rwRENDERSTATEVERTEXALPHAENABLE, (void*)FALSE);
+	RwRenderStateSet(rwRENDERSTATESRCBLEND, (void*)rwBLENDSRCALPHA);
+	RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDINVSRCALPHA);
+	RwRenderStateSet(rwRENDERSTATETEXTURERASTER, nil);
+
+	int32 color = 255;
+	RwIm3DVertex TempVertexBuffer[2];
+	RwIm3DVertexSetRGBA(&TempVertexBuffer[0], color, color, color, color);
+	RwIm3DVertexSetPos(&TempVertexBuffer[0], startPos.x, startPos.y, startPos.z);
+	RwIm3DVertexSetRGBA(&TempVertexBuffer[1], color, color, color, color);
+	RwIm3DVertexSetPos(&TempVertexBuffer[1], endPos.x, endPos.y, endPos.z);
+
+	if (RwIm3DTransform(TempVertexBuffer, 2, nil, rwIM3D_VERTEXXYZ | rwIM3D_VERTEXRGBA)) {
+		RwIm3DRenderIndexedPrimitive(rwPRIMTYPEPOLYLINE, SmokeTrailIndices, 2);
+		RwIm3DEnd();
+	}
+}
diff --git a/src/render/SmokeTrails.h b/src/render/SmokeTrails.h
new file mode 100644
index 00000000..87fc8b2b
--- /dev/null
+++ b/src/render/SmokeTrails.h
@@ -0,0 +1,23 @@
+#pragma once
+
+class CSmokeTrail {
+	CVector m_pos[16];
+	float m_density[16];
+	int m_time[16];
+	char m_unused[536];
+	int m_seed;
+public:
+	void Render(void);
+	void RegisterPoint(CVector position, float a);
+	void Init(int num);
+};
+
+class CSmokeTrails {
+	static CSmokeTrail aSmoke[3];
+public:
+	static bool CigOn;
+	static void Update(void);
+	static void Render(void);
+	static void Init(void);
+};
+