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authorDavid Walter Seikel2013-01-13 18:54:10 +1000
committerDavid Walter Seikel2013-01-13 18:54:10 +1000
commit959831f4ef5a3e797f576c3de08cd65032c997ad (patch)
treee7351908be5995f0b325b2ebeaa02d5a34b82583 /libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp
parentAdd info about changes to Irrlicht. (diff)
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Remove damned ancient DOS line endings from Irrlicht. Hopefully I did not go overboard.
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp')
-rw-r--r--libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp936
1 files changed, 468 insertions, 468 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp b/libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp
index 3b2795d..fd3a020 100644
--- a/libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp
+++ b/libraries/irrlicht-1.8/source/Irrlicht/CTRTextureGouraud.cpp
@@ -1,468 +1,468 @@
1// Copyright (C) 2002-2012 Nikolaus Gebhardt 1// Copyright (C) 2002-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine". 2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h 3// For conditions of distribution and use, see copyright notice in irrlicht.h
4 4
5#include "CTRTextureGouraud.h" 5#include "CTRTextureGouraud.h"
6 6
7#ifdef _IRR_COMPILE_WITH_SOFTWARE_ 7#ifdef _IRR_COMPILE_WITH_SOFTWARE_
8 8
9namespace irr 9namespace irr
10{ 10{
11namespace video 11namespace video
12{ 12{
13 13
14//! constructor 14//! constructor
15CTRTextureGouraud::CTRTextureGouraud(IZBuffer* zbuffer) 15CTRTextureGouraud::CTRTextureGouraud(IZBuffer* zbuffer)
16 : RenderTarget(0), ZBuffer(zbuffer), SurfaceWidth(0), SurfaceHeight(0), 16 : RenderTarget(0), ZBuffer(zbuffer), SurfaceWidth(0), SurfaceHeight(0),
17 BackFaceCullingEnabled(true), lockedZBuffer(0), 17 BackFaceCullingEnabled(true), lockedZBuffer(0),
18 lockedSurface(0), lockedTexture(0), lockedTextureWidth(0), 18 lockedSurface(0), lockedTexture(0), lockedTextureWidth(0),
19 textureXMask(0), textureYMask(0), Texture(0) 19 textureXMask(0), textureYMask(0), Texture(0)
20{ 20{
21 #ifdef _DEBUG 21 #ifdef _DEBUG
22 setDebugName("CTRTextureGouraud"); 22 setDebugName("CTRTextureGouraud");
23 #endif 23 #endif
24 24
25 if (ZBuffer) 25 if (ZBuffer)
26 zbuffer->grab(); 26 zbuffer->grab();
27} 27}
28 28
29 29
30 30
31//! destructor 31//! destructor
32CTRTextureGouraud::~CTRTextureGouraud() 32CTRTextureGouraud::~CTRTextureGouraud()
33{ 33{
34 if (RenderTarget) 34 if (RenderTarget)
35 RenderTarget->drop(); 35 RenderTarget->drop();
36 36
37 if (ZBuffer) 37 if (ZBuffer)
38 ZBuffer->drop(); 38 ZBuffer->drop();
39 39
40 if (Texture) 40 if (Texture)
41 Texture->drop(); 41 Texture->drop();
42} 42}
43 43
44 44
45 45
46//! sets the Texture 46//! sets the Texture
47void CTRTextureGouraud::setTexture(video::IImage* texture) 47void CTRTextureGouraud::setTexture(video::IImage* texture)
48{ 48{
49 if (Texture) 49 if (Texture)
50 Texture->drop(); 50 Texture->drop();
51 51
52 Texture = texture; 52 Texture = texture;
53 53
54 if (Texture) 54 if (Texture)
55 { 55 {
56 Texture->grab(); 56 Texture->grab();
57 lockedTextureWidth = Texture->getDimension().Width; 57 lockedTextureWidth = Texture->getDimension().Width;
58 58
59 textureXMask = lockedTextureWidth-1; 59 textureXMask = lockedTextureWidth-1;
60 textureYMask = Texture->getDimension().Height-1; 60 textureYMask = Texture->getDimension().Height-1;
61 } 61 }
62} 62}
63 63
64 64
65 65
66 66
67//! en or disables the backface culling 67//! en or disables the backface culling
68void CTRTextureGouraud::setBackfaceCulling(bool enabled) 68void CTRTextureGouraud::setBackfaceCulling(bool enabled)
69{ 69{
70 BackFaceCullingEnabled = enabled; 70 BackFaceCullingEnabled = enabled;
71} 71}
72 72
73 73
74 74
75//! sets a render target 75//! sets a render target
76void CTRTextureGouraud::setRenderTarget(video::IImage* surface, const core::rect<s32>& viewPort) 76void CTRTextureGouraud::setRenderTarget(video::IImage* surface, const core::rect<s32>& viewPort)
77{ 77{
78 if (RenderTarget) 78 if (RenderTarget)
79 RenderTarget->drop(); 79 RenderTarget->drop();
80 80
81 RenderTarget = surface; 81 RenderTarget = surface;
82 82
83 if (RenderTarget) 83 if (RenderTarget)
84 { 84 {
85 SurfaceWidth = RenderTarget->getDimension().Width; 85 SurfaceWidth = RenderTarget->getDimension().Width;
86 SurfaceHeight = RenderTarget->getDimension().Height; 86 SurfaceHeight = RenderTarget->getDimension().Height;
87 RenderTarget->grab(); 87 RenderTarget->grab();
88 ViewPortRect = viewPort; 88 ViewPortRect = viewPort;
89 } 89 }
90} 90}
91 91
92 92
93 93
94//! draws an indexed triangle list 94//! draws an indexed triangle list
95void CTRTextureGouraud::drawIndexedTriangleList(S2DVertex* vertices, s32 vertexCount, const u16* indexList, s32 triangleCount) 95void CTRTextureGouraud::drawIndexedTriangleList(S2DVertex* vertices, s32 vertexCount, const u16* indexList, s32 triangleCount)
96{ 96{
97 const S2DVertex *v1, *v2, *v3; 97 const S2DVertex *v1, *v2, *v3;
98 98
99 f32 tmpDiv; // temporary division factor 99 f32 tmpDiv; // temporary division factor
100 f32 longest; // saves the longest span 100 f32 longest; // saves the longest span
101 s32 height; // saves height of triangle 101 s32 height; // saves height of triangle
102 u16* targetSurface; // target pointer where to plot pixels 102 u16* targetSurface; // target pointer where to plot pixels
103 s32 spanEnd; // saves end of spans 103 s32 spanEnd; // saves end of spans
104 f32 leftdeltaxf; // amount of pixels to increase on left side of triangle 104 f32 leftdeltaxf; // amount of pixels to increase on left side of triangle
105 f32 rightdeltaxf; // amount of pixels to increase on right side of triangle 105 f32 rightdeltaxf; // amount of pixels to increase on right side of triangle
106 s32 leftx, rightx; // position where we are 106 s32 leftx, rightx; // position where we are
107 f32 leftxf, rightxf; // same as above, but as f32 values 107 f32 leftxf, rightxf; // same as above, but as f32 values
108 s32 span; // current span 108 s32 span; // current span
109 u16 *hSpanBegin, *hSpanEnd; // pointer used when plotting pixels 109 u16 *hSpanBegin, *hSpanEnd; // pointer used when plotting pixels
110 s32 leftR, leftG, leftB, rightR, rightG, rightB; // color values 110 s32 leftR, leftG, leftB, rightR, rightG, rightB; // color values
111 s32 leftStepR, leftStepG, leftStepB, 111 s32 leftStepR, leftStepG, leftStepB,
112 rightStepR, rightStepG, rightStepB; // color steps 112 rightStepR, rightStepG, rightStepB; // color steps
113 s32 spanR, spanG, spanB, spanStepR, spanStepG, spanStepB; // color interpolating values while drawing a span. 113 s32 spanR, spanG, spanB, spanStepR, spanStepG, spanStepB; // color interpolating values while drawing a span.
114 s32 leftTx, rightTx, leftTy, rightTy; // texture interpolating values 114 s32 leftTx, rightTx, leftTy, rightTy; // texture interpolating values
115 s32 leftTxStep, rightTxStep, leftTyStep, rightTyStep; // texture interpolating values 115 s32 leftTxStep, rightTxStep, leftTyStep, rightTyStep; // texture interpolating values
116 s32 spanTx, spanTy, spanTxStep, spanTyStep; // values of Texturecoords when drawing a span 116 s32 spanTx, spanTy, spanTxStep, spanTyStep; // values of Texturecoords when drawing a span
117 core::rect<s32> TriangleRect; 117 core::rect<s32> TriangleRect;
118 118
119 s32 leftZValue, rightZValue; 119 s32 leftZValue, rightZValue;
120 s32 leftZStep, rightZStep; 120 s32 leftZStep, rightZStep;
121 s32 spanZValue, spanZStep; // ZValues when drawing a span 121 s32 spanZValue, spanZStep; // ZValues when drawing a span
122 TZBufferType* zTarget, *spanZTarget; // target of ZBuffer; 122 TZBufferType* zTarget, *spanZTarget; // target of ZBuffer;
123 123
124 lockedSurface = (u16*)RenderTarget->lock(); 124 lockedSurface = (u16*)RenderTarget->lock();
125 lockedZBuffer = ZBuffer->lock(); 125 lockedZBuffer = ZBuffer->lock();
126 lockedTexture = (u16*)Texture->lock(); 126 lockedTexture = (u16*)Texture->lock();
127 127
128 for (s32 i=0; i<triangleCount; ++i) 128 for (s32 i=0; i<triangleCount; ++i)
129 { 129 {
130 v1 = &vertices[*indexList]; 130 v1 = &vertices[*indexList];
131 ++indexList; 131 ++indexList;
132 v2 = &vertices[*indexList]; 132 v2 = &vertices[*indexList];
133 ++indexList; 133 ++indexList;
134 v3 = &vertices[*indexList]; 134 v3 = &vertices[*indexList];
135 ++indexList; 135 ++indexList;
136 136
137 // back face culling 137 // back face culling
138 138
139 if (BackFaceCullingEnabled) 139 if (BackFaceCullingEnabled)
140 { 140 {
141 s32 z = ((v3->Pos.X - v1->Pos.X) * (v3->Pos.Y - v2->Pos.Y)) - 141 s32 z = ((v3->Pos.X - v1->Pos.X) * (v3->Pos.Y - v2->Pos.Y)) -
142 ((v3->Pos.Y - v1->Pos.Y) * (v3->Pos.X - v2->Pos.X)); 142 ((v3->Pos.Y - v1->Pos.Y) * (v3->Pos.X - v2->Pos.X));
143 143
144 if (z < 0) 144 if (z < 0)
145 continue; 145 continue;
146 } 146 }
147 147
148 //near plane clipping 148 //near plane clipping
149 149
150 if (v1->ZValue<0 && v2->ZValue<0 && v3->ZValue<0) 150 if (v1->ZValue<0 && v2->ZValue<0 && v3->ZValue<0)
151 continue; 151 continue;
152 152
153 // sort for width for inscreen clipping 153 // sort for width for inscreen clipping
154 154
155 if (v1->Pos.X > v2->Pos.X) swapVertices(&v1, &v2); 155 if (v1->Pos.X > v2->Pos.X) swapVertices(&v1, &v2);
156 if (v1->Pos.X > v3->Pos.X) swapVertices(&v1, &v3); 156 if (v1->Pos.X > v3->Pos.X) swapVertices(&v1, &v3);
157 if (v2->Pos.X > v3->Pos.X) swapVertices(&v2, &v3); 157 if (v2->Pos.X > v3->Pos.X) swapVertices(&v2, &v3);
158 158
159 if ((v1->Pos.X - v3->Pos.X) == 0) 159 if ((v1->Pos.X - v3->Pos.X) == 0)
160 continue; 160 continue;
161 161
162 TriangleRect.UpperLeftCorner.X = v1->Pos.X; 162 TriangleRect.UpperLeftCorner.X = v1->Pos.X;
163 TriangleRect.LowerRightCorner.X = v3->Pos.X; 163 TriangleRect.LowerRightCorner.X = v3->Pos.X;
164 164
165 // sort for height for faster drawing. 165 // sort for height for faster drawing.
166 166
167 if (v1->Pos.Y > v2->Pos.Y) swapVertices(&v1, &v2); 167 if (v1->Pos.Y > v2->Pos.Y) swapVertices(&v1, &v2);
168 if (v1->Pos.Y > v3->Pos.Y) swapVertices(&v1, &v3); 168 if (v1->Pos.Y > v3->Pos.Y) swapVertices(&v1, &v3);
169 if (v2->Pos.Y > v3->Pos.Y) swapVertices(&v2, &v3); 169 if (v2->Pos.Y > v3->Pos.Y) swapVertices(&v2, &v3);
170 170
171 TriangleRect.UpperLeftCorner.Y = v1->Pos.Y; 171 TriangleRect.UpperLeftCorner.Y = v1->Pos.Y;
172 TriangleRect.LowerRightCorner.Y = v3->Pos.Y; 172 TriangleRect.LowerRightCorner.Y = v3->Pos.Y;
173 173
174 if (!TriangleRect.isRectCollided(ViewPortRect)) 174 if (!TriangleRect.isRectCollided(ViewPortRect))
175 continue; 175 continue;
176 176
177 // calculate height of triangle 177 // calculate height of triangle
178 height = v3->Pos.Y - v1->Pos.Y; 178 height = v3->Pos.Y - v1->Pos.Y;
179 if (!height) 179 if (!height)
180 continue; 180 continue;
181 181
182 // calculate longest span 182 // calculate longest span
183 183
184 longest = (v2->Pos.Y - v1->Pos.Y) / (f32)height * (v3->Pos.X - v1->Pos.X) + (v1->Pos.X - v2->Pos.X); 184 longest = (v2->Pos.Y - v1->Pos.Y) / (f32)height * (v3->Pos.X - v1->Pos.X) + (v1->Pos.X - v2->Pos.X);
185 185
186 spanEnd = v2->Pos.Y; 186 spanEnd = v2->Pos.Y;
187 span = v1->Pos.Y; 187 span = v1->Pos.Y;
188 leftxf = (f32)v1->Pos.X; 188 leftxf = (f32)v1->Pos.X;
189 rightxf = (f32)v1->Pos.X; 189 rightxf = (f32)v1->Pos.X;
190 190
191 leftZValue = v1->ZValue; 191 leftZValue = v1->ZValue;
192 rightZValue = v1->ZValue; 192 rightZValue = v1->ZValue;
193 193
194 leftR = rightR = video::getRed(v1->Color)<<8; 194 leftR = rightR = video::getRed(v1->Color)<<8;
195 leftG = rightG = video::getGreen(v1->Color)<<8; 195 leftG = rightG = video::getGreen(v1->Color)<<8;
196 leftB = rightB = video::getBlue(v1->Color)<<8; 196 leftB = rightB = video::getBlue(v1->Color)<<8;
197 leftTx = rightTx = v1->TCoords.X; 197 leftTx = rightTx = v1->TCoords.X;
198 leftTy = rightTy = v1->TCoords.Y; 198 leftTy = rightTy = v1->TCoords.Y;
199 199
200 targetSurface = lockedSurface + span * SurfaceWidth; 200 targetSurface = lockedSurface + span * SurfaceWidth;
201 zTarget = lockedZBuffer + span * SurfaceWidth; 201 zTarget = lockedZBuffer + span * SurfaceWidth;
202 202
203 if (longest < 0.0f) 203 if (longest < 0.0f)
204 { 204 {
205 tmpDiv = 1.0f / (f32)(v2->Pos.Y - v1->Pos.Y); 205 tmpDiv = 1.0f / (f32)(v2->Pos.Y - v1->Pos.Y);
206 rightdeltaxf = (v2->Pos.X - v1->Pos.X) * tmpDiv; 206 rightdeltaxf = (v2->Pos.X - v1->Pos.X) * tmpDiv;
207 rightZStep = (s32)((v2->ZValue - v1->ZValue) * tmpDiv); 207 rightZStep = (s32)((v2->ZValue - v1->ZValue) * tmpDiv);
208 rightStepR = (s32)(((s32)(video::getRed(v2->Color)<<8) - rightR) * tmpDiv); 208 rightStepR = (s32)(((s32)(video::getRed(v2->Color)<<8) - rightR) * tmpDiv);
209 rightStepG = (s32)(((s32)(video::getGreen(v2->Color)<<8) - rightG) * tmpDiv); 209 rightStepG = (s32)(((s32)(video::getGreen(v2->Color)<<8) - rightG) * tmpDiv);
210 rightStepB = (s32)(((s32)(video::getBlue(v2->Color)<<8) - rightB) * tmpDiv); 210 rightStepB = (s32)(((s32)(video::getBlue(v2->Color)<<8) - rightB) * tmpDiv);
211 rightTxStep = (s32)((v2->TCoords.X - rightTx) * tmpDiv); 211 rightTxStep = (s32)((v2->TCoords.X - rightTx) * tmpDiv);
212 rightTyStep = (s32)((v2->TCoords.Y - rightTy) * tmpDiv); 212 rightTyStep = (s32)((v2->TCoords.Y - rightTy) * tmpDiv);
213 213
214 tmpDiv = 1.0f / (f32)height; 214 tmpDiv = 1.0f / (f32)height;
215 leftdeltaxf = (v3->Pos.X - v1->Pos.X) * tmpDiv; 215 leftdeltaxf = (v3->Pos.X - v1->Pos.X) * tmpDiv;
216 leftZStep = (s32)((v3->ZValue - v1->ZValue) * tmpDiv); 216 leftZStep = (s32)((v3->ZValue - v1->ZValue) * tmpDiv);
217 leftStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - leftR) * tmpDiv); 217 leftStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - leftR) * tmpDiv);
218 leftStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - leftG) * tmpDiv); 218 leftStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - leftG) * tmpDiv);
219 leftStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - leftB) * tmpDiv); 219 leftStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - leftB) * tmpDiv);
220 leftTxStep = (s32)((v3->TCoords.X - leftTx) * tmpDiv); 220 leftTxStep = (s32)((v3->TCoords.X - leftTx) * tmpDiv);
221 leftTyStep = (s32)((v3->TCoords.Y - leftTy) * tmpDiv); 221 leftTyStep = (s32)((v3->TCoords.Y - leftTy) * tmpDiv);
222 } 222 }
223 else 223 else
224 { 224 {
225 tmpDiv = 1.0f / (f32)height; 225 tmpDiv = 1.0f / (f32)height;
226 rightdeltaxf = (v3->Pos.X - v1->Pos.X) * tmpDiv; 226 rightdeltaxf = (v3->Pos.X - v1->Pos.X) * tmpDiv;
227 rightZStep = (s32)((v3->ZValue - v1->ZValue) * tmpDiv); 227 rightZStep = (s32)((v3->ZValue - v1->ZValue) * tmpDiv);
228 rightStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - rightR) * tmpDiv); 228 rightStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - rightR) * tmpDiv);
229 rightStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - rightG) * tmpDiv); 229 rightStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - rightG) * tmpDiv);
230 rightStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - rightB) * tmpDiv); 230 rightStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - rightB) * tmpDiv);
231 rightTxStep = (s32)((v3->TCoords.X - rightTx) * tmpDiv); 231 rightTxStep = (s32)((v3->TCoords.X - rightTx) * tmpDiv);
232 rightTyStep = (s32)((v3->TCoords.Y - rightTy) * tmpDiv); 232 rightTyStep = (s32)((v3->TCoords.Y - rightTy) * tmpDiv);
233 233
234 tmpDiv = 1.0f / (f32)(v2->Pos.Y - v1->Pos.Y); 234 tmpDiv = 1.0f / (f32)(v2->Pos.Y - v1->Pos.Y);
235 leftdeltaxf = (v2->Pos.X - v1->Pos.X) * tmpDiv; 235 leftdeltaxf = (v2->Pos.X - v1->Pos.X) * tmpDiv;
236 leftZStep = (s32)((v2->ZValue - v1->ZValue) * tmpDiv); 236 leftZStep = (s32)((v2->ZValue - v1->ZValue) * tmpDiv);
237 leftStepR = (s32)(((s32)(video::getRed(v2->Color)<<8) - leftR) * tmpDiv); 237 leftStepR = (s32)(((s32)(video::getRed(v2->Color)<<8) - leftR) * tmpDiv);
238 leftStepG = (s32)(((s32)(video::getGreen(v2->Color)<<8) - leftG) * tmpDiv); 238 leftStepG = (s32)(((s32)(video::getGreen(v2->Color)<<8) - leftG) * tmpDiv);
239 leftStepB = (s32)(((s32)(video::getBlue(v2->Color)<<8) - leftB) * tmpDiv); 239 leftStepB = (s32)(((s32)(video::getBlue(v2->Color)<<8) - leftB) * tmpDiv);
240 leftTxStep = (s32)((v2->TCoords.X - leftTx) * tmpDiv); 240 leftTxStep = (s32)((v2->TCoords.X - leftTx) * tmpDiv);
241 leftTyStep = (s32)((v2->TCoords.Y - leftTy) * tmpDiv); 241 leftTyStep = (s32)((v2->TCoords.Y - leftTy) * tmpDiv);
242 } 242 }
243 243
244 244
245 // do it twice, once for the first half of the triangle, 245 // do it twice, once for the first half of the triangle,
246 // end then for the second half. 246 // end then for the second half.
247 247
248 for (s32 triangleHalf=0; triangleHalf<2; ++triangleHalf) 248 for (s32 triangleHalf=0; triangleHalf<2; ++triangleHalf)
249 { 249 {
250 if (spanEnd > ViewPortRect.LowerRightCorner.Y) 250 if (spanEnd > ViewPortRect.LowerRightCorner.Y)
251 spanEnd = ViewPortRect.LowerRightCorner.Y; 251 spanEnd = ViewPortRect.LowerRightCorner.Y;
252 252
253 // if the span <0, than we can skip these spans, 253 // if the span <0, than we can skip these spans,
254 // and proceed to the next spans which are really on the screen. 254 // and proceed to the next spans which are really on the screen.
255 if (span < ViewPortRect.UpperLeftCorner.Y) 255 if (span < ViewPortRect.UpperLeftCorner.Y)
256 { 256 {
257 // we'll use leftx as temp variable 257 // we'll use leftx as temp variable
258 if (spanEnd < ViewPortRect.UpperLeftCorner.Y) 258 if (spanEnd < ViewPortRect.UpperLeftCorner.Y)
259 { 259 {
260 leftx = spanEnd - span; 260 leftx = spanEnd - span;
261 span = spanEnd; 261 span = spanEnd;
262 } 262 }
263 else 263 else
264 { 264 {
265 leftx = ViewPortRect.UpperLeftCorner.Y - span; 265 leftx = ViewPortRect.UpperLeftCorner.Y - span;
266 span = ViewPortRect.UpperLeftCorner.Y; 266 span = ViewPortRect.UpperLeftCorner.Y;
267 } 267 }
268 268
269 leftxf += leftdeltaxf*leftx; 269 leftxf += leftdeltaxf*leftx;
270 rightxf += rightdeltaxf*leftx; 270 rightxf += rightdeltaxf*leftx;
271 targetSurface += SurfaceWidth*leftx; 271 targetSurface += SurfaceWidth*leftx;
272 zTarget += SurfaceWidth*leftx; 272 zTarget += SurfaceWidth*leftx;
273 leftZValue += leftZStep*leftx; 273 leftZValue += leftZStep*leftx;
274 rightZValue += rightZStep*leftx; 274 rightZValue += rightZStep*leftx;
275 275
276 leftR += leftStepR*leftx; 276 leftR += leftStepR*leftx;
277 leftG += leftStepG*leftx; 277 leftG += leftStepG*leftx;
278 leftB += leftStepB*leftx; 278 leftB += leftStepB*leftx;
279 rightR += rightStepR*leftx; 279 rightR += rightStepR*leftx;
280 rightG += rightStepG*leftx; 280 rightG += rightStepG*leftx;
281 rightB += rightStepB*leftx; 281 rightB += rightStepB*leftx;
282 282
283 leftTx += leftTxStep*leftx; 283 leftTx += leftTxStep*leftx;
284 leftTy += leftTyStep*leftx; 284 leftTy += leftTyStep*leftx;
285 rightTx += rightTxStep*leftx; 285 rightTx += rightTxStep*leftx;
286 rightTy += rightTyStep*leftx; 286 rightTy += rightTyStep*leftx;
287 } 287 }
288 288
289 289
290 // the main loop. Go through every span and draw it. 290 // the main loop. Go through every span and draw it.
291 291
292 while (span < spanEnd) 292 while (span < spanEnd)
293 { 293 {
294 leftx = (s32)(leftxf); 294 leftx = (s32)(leftxf);
295 rightx = (s32)(rightxf + 0.5f); 295 rightx = (s32)(rightxf + 0.5f);
296 296
297 // perform some clipping 297 // perform some clipping
298 // thanks to a correction by hybrid 298 // thanks to a correction by hybrid
299 // calculations delayed to correctly propagate to textures etc. 299 // calculations delayed to correctly propagate to textures etc.
300 s32 tDiffLeft=0, tDiffRight=0; 300 s32 tDiffLeft=0, tDiffRight=0;
301 if (leftx<ViewPortRect.UpperLeftCorner.X) 301 if (leftx<ViewPortRect.UpperLeftCorner.X)
302 tDiffLeft=ViewPortRect.UpperLeftCorner.X-leftx; 302 tDiffLeft=ViewPortRect.UpperLeftCorner.X-leftx;
303 else 303 else
304 if (leftx>ViewPortRect.LowerRightCorner.X) 304 if (leftx>ViewPortRect.LowerRightCorner.X)
305 tDiffLeft=ViewPortRect.LowerRightCorner.X-leftx; 305 tDiffLeft=ViewPortRect.LowerRightCorner.X-leftx;
306 306
307 if (rightx<ViewPortRect.UpperLeftCorner.X) 307 if (rightx<ViewPortRect.UpperLeftCorner.X)
308 tDiffRight=ViewPortRect.UpperLeftCorner.X-rightx; 308 tDiffRight=ViewPortRect.UpperLeftCorner.X-rightx;
309 else 309 else
310 if (rightx>ViewPortRect.LowerRightCorner.X) 310 if (rightx>ViewPortRect.LowerRightCorner.X)
311 tDiffRight=ViewPortRect.LowerRightCorner.X-rightx; 311 tDiffRight=ViewPortRect.LowerRightCorner.X-rightx;
312 312
313 // draw the span 313 // draw the span
314 if (rightx + tDiffRight - leftx - tDiffLeft) 314 if (rightx + tDiffRight - leftx - tDiffLeft)
315 { 315 {
316 tmpDiv = 1.0f / (f32)(rightx - leftx); 316 tmpDiv = 1.0f / (f32)(rightx - leftx);
317 spanZStep = (s32)((rightZValue - leftZValue) * tmpDiv); 317 spanZStep = (s32)((rightZValue - leftZValue) * tmpDiv);
318 spanZValue = leftZValue+tDiffLeft*spanZStep; 318 spanZValue = leftZValue+tDiffLeft*spanZStep;
319 319
320 spanStepR = (s32)((rightR - leftR) * tmpDiv); 320 spanStepR = (s32)((rightR - leftR) * tmpDiv);
321 spanR = leftR+tDiffLeft*spanStepR; 321 spanR = leftR+tDiffLeft*spanStepR;
322 spanStepG = (s32)((rightG - leftG) * tmpDiv); 322 spanStepG = (s32)((rightG - leftG) * tmpDiv);
323 spanG = leftG+tDiffLeft*spanStepG; 323 spanG = leftG+tDiffLeft*spanStepG;
324 spanStepB = (s32)((rightB - leftB) * tmpDiv); 324 spanStepB = (s32)((rightB - leftB) * tmpDiv);
325 spanB = leftB+tDiffLeft*spanStepB; 325 spanB = leftB+tDiffLeft*spanStepB;
326 326
327 spanTxStep = (s32)((rightTx - leftTx) * tmpDiv); 327 spanTxStep = (s32)((rightTx - leftTx) * tmpDiv);
328 spanTx = leftTx + tDiffLeft*spanTxStep; 328 spanTx = leftTx + tDiffLeft*spanTxStep;
329 spanTyStep = (s32)((rightTy - leftTy) * tmpDiv); 329 spanTyStep = (s32)((rightTy - leftTy) * tmpDiv);
330 spanTy = leftTy+tDiffLeft*spanTyStep; 330 spanTy = leftTy+tDiffLeft*spanTyStep;
331 331
332 hSpanBegin = targetSurface + leftx+tDiffLeft; 332 hSpanBegin = targetSurface + leftx+tDiffLeft;
333 spanZTarget = zTarget + leftx+tDiffLeft; 333 spanZTarget = zTarget + leftx+tDiffLeft;
334 hSpanEnd = targetSurface + rightx+tDiffRight; 334 hSpanEnd = targetSurface + rightx+tDiffRight;
335 335
336 while (hSpanBegin < hSpanEnd) 336 while (hSpanBegin < hSpanEnd)
337 { 337 {
338 if (spanZValue > *spanZTarget) 338 if (spanZValue > *spanZTarget)
339 { 339 {
340 *spanZTarget = spanZValue; 340 *spanZTarget = spanZValue;
341 u16 color = lockedTexture[((spanTy>>8)&textureYMask) * lockedTextureWidth + ((spanTx>>8)&textureXMask)]; 341 u16 color = lockedTexture[((spanTy>>8)&textureYMask) * lockedTextureWidth + ((spanTx>>8)&textureXMask)];
342 *hSpanBegin = video::RGB16(video::getRed(color) * (spanR>>8) >>2, 342 *hSpanBegin = video::RGB16(video::getRed(color) * (spanR>>8) >>2,
343 video::getGreen(color) * (spanG>>8) >>2, 343 video::getGreen(color) * (spanG>>8) >>2,
344 video::getBlue(color) * (spanB>>8) >>2); 344 video::getBlue(color) * (spanB>>8) >>2);
345 } 345 }
346 346
347 spanR += spanStepR; 347 spanR += spanStepR;
348 spanG += spanStepG; 348 spanG += spanStepG;
349 spanB += spanStepB; 349 spanB += spanStepB;
350 350
351 spanTx += spanTxStep; 351 spanTx += spanTxStep;
352 spanTy += spanTyStep; 352 spanTy += spanTyStep;
353 353
354 spanZValue += spanZStep; 354 spanZValue += spanZStep;
355 ++hSpanBegin; 355 ++hSpanBegin;
356 ++spanZTarget; 356 ++spanZTarget;
357 } 357 }
358 } 358 }
359 359
360 leftxf += leftdeltaxf; 360 leftxf += leftdeltaxf;
361 rightxf += rightdeltaxf; 361 rightxf += rightdeltaxf;
362 ++span; 362 ++span;
363 targetSurface += SurfaceWidth; 363 targetSurface += SurfaceWidth;
364 zTarget += SurfaceWidth; 364 zTarget += SurfaceWidth;
365 leftZValue += leftZStep; 365 leftZValue += leftZStep;
366 rightZValue += rightZStep; 366 rightZValue += rightZStep;
367 367
368 leftR += leftStepR; 368 leftR += leftStepR;
369 leftG += leftStepG; 369 leftG += leftStepG;
370 leftB += leftStepB; 370 leftB += leftStepB;
371 rightR += rightStepR; 371 rightR += rightStepR;
372 rightG += rightStepG; 372 rightG += rightStepG;
373 rightB += rightStepB; 373 rightB += rightStepB;
374 374
375 leftTx += leftTxStep; 375 leftTx += leftTxStep;
376 leftTy += leftTyStep; 376 leftTy += leftTyStep;
377 rightTx += rightTxStep; 377 rightTx += rightTxStep;
378 rightTy += rightTyStep; 378 rightTy += rightTyStep;
379 } 379 }
380 380
381 if (triangleHalf>0) // break, we've gout only two halves 381 if (triangleHalf>0) // break, we've gout only two halves
382 break; 382 break;
383 383
384 384
385 // setup variables for second half of the triangle. 385 // setup variables for second half of the triangle.
386 386
387 if (longest < 0.0f) 387 if (longest < 0.0f)
388 { 388 {
389 tmpDiv = 1.0f / (v3->Pos.Y - v2->Pos.Y); 389 tmpDiv = 1.0f / (v3->Pos.Y - v2->Pos.Y);
390 390
391 rightdeltaxf = (v3->Pos.X - v2->Pos.X) * tmpDiv; 391 rightdeltaxf = (v3->Pos.X - v2->Pos.X) * tmpDiv;
392 rightxf = (f32)v2->Pos.X; 392 rightxf = (f32)v2->Pos.X;
393 393
394 rightZValue = v2->ZValue; 394 rightZValue = v2->ZValue;
395 rightZStep = (s32)((v3->ZValue - v2->ZValue) * tmpDiv); 395 rightZStep = (s32)((v3->ZValue - v2->ZValue) * tmpDiv);
396 396
397 rightR = video::getRed(v2->Color)<<8; 397 rightR = video::getRed(v2->Color)<<8;
398 rightG = video::getGreen(v2->Color)<<8; 398 rightG = video::getGreen(v2->Color)<<8;
399 rightB = video::getBlue(v2->Color)<<8; 399 rightB = video::getBlue(v2->Color)<<8;
400 rightStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - rightR) * tmpDiv); 400 rightStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - rightR) * tmpDiv);
401 rightStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - rightG) * tmpDiv); 401 rightStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - rightG) * tmpDiv);
402 rightStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - rightB) * tmpDiv); 402 rightStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - rightB) * tmpDiv);
403 403
404 rightTx = v2->TCoords.X; 404 rightTx = v2->TCoords.X;
405 rightTy = v2->TCoords.Y; 405 rightTy = v2->TCoords.Y;
406 rightTxStep = (s32)((v3->TCoords.X - rightTx) * tmpDiv); 406 rightTxStep = (s32)((v3->TCoords.X - rightTx) * tmpDiv);
407 rightTyStep = (s32)((v3->TCoords.Y - rightTy) * tmpDiv); 407 rightTyStep = (s32)((v3->TCoords.Y - rightTy) * tmpDiv);
408 } 408 }
409 else 409 else
410 { 410 {
411 tmpDiv = 1.0f / (v3->Pos.Y - v2->Pos.Y); 411 tmpDiv = 1.0f / (v3->Pos.Y - v2->Pos.Y);
412 412
413 leftdeltaxf = (v3->Pos.X - v2->Pos.X) * tmpDiv; 413 leftdeltaxf = (v3->Pos.X - v2->Pos.X) * tmpDiv;
414 leftxf = (f32)v2->Pos.X; 414 leftxf = (f32)v2->Pos.X;
415 415
416 leftZValue = v2->ZValue; 416 leftZValue = v2->ZValue;
417 leftZStep = (s32)((v3->ZValue - v2->ZValue) * tmpDiv); 417 leftZStep = (s32)((v3->ZValue - v2->ZValue) * tmpDiv);
418 418
419 leftR = video::getRed(v2->Color)<<8; 419 leftR = video::getRed(v2->Color)<<8;
420 leftG = video::getGreen(v2->Color)<<8; 420 leftG = video::getGreen(v2->Color)<<8;
421 leftB = video::getBlue(v2->Color)<<8; 421 leftB = video::getBlue(v2->Color)<<8;
422 leftStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - leftR) * tmpDiv); 422 leftStepR = (s32)(((s32)(video::getRed(v3->Color)<<8) - leftR) * tmpDiv);
423 leftStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - leftG) * tmpDiv); 423 leftStepG = (s32)(((s32)(video::getGreen(v3->Color)<<8) - leftG) * tmpDiv);
424 leftStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - leftB) * tmpDiv); 424 leftStepB = (s32)(((s32)(video::getBlue(v3->Color)<<8) - leftB) * tmpDiv);
425 425
426 leftTx = v2->TCoords.X; 426 leftTx = v2->TCoords.X;
427 leftTy = v2->TCoords.Y; 427 leftTy = v2->TCoords.Y;
428 leftTxStep = (s32)((v3->TCoords.X - leftTx) * tmpDiv); 428 leftTxStep = (s32)((v3->TCoords.X - leftTx) * tmpDiv);
429 leftTyStep = (s32)((v3->TCoords.Y - leftTy) * tmpDiv); 429 leftTyStep = (s32)((v3->TCoords.Y - leftTy) * tmpDiv);
430 } 430 }
431 431
432 432
433 spanEnd = v3->Pos.Y; 433 spanEnd = v3->Pos.Y;
434 } 434 }
435 435
436 } 436 }
437 437
438 RenderTarget->unlock(); 438 RenderTarget->unlock();
439 ZBuffer->unlock(); 439 ZBuffer->unlock();
440 Texture->unlock(); 440 Texture->unlock();
441} 441}
442 442
443 443
444} // end namespace video 444} // end namespace video
445} // end namespace irr 445} // end namespace irr
446 446
447#endif // _IRR_COMPILE_WITH_SOFTWARE_ 447#endif // _IRR_COMPILE_WITH_SOFTWARE_
448 448
449namespace irr 449namespace irr
450{ 450{
451namespace video 451namespace video
452{ 452{
453 453
454//! creates a flat triangle renderer 454//! creates a flat triangle renderer
455ITriangleRenderer* createTriangleRendererTextureGouraud(IZBuffer* zbuffer) 455ITriangleRenderer* createTriangleRendererTextureGouraud(IZBuffer* zbuffer)
456{ 456{
457 #ifdef _IRR_COMPILE_WITH_SOFTWARE_ 457 #ifdef _IRR_COMPILE_WITH_SOFTWARE_
458 return new CTRTextureGouraud(zbuffer); 458 return new CTRTextureGouraud(zbuffer);
459 #else 459 #else
460 return 0; 460 return 0;
461 #endif // _IRR_COMPILE_WITH_SOFTWARE_ 461 #endif // _IRR_COMPILE_WITH_SOFTWARE_
462} 462}
463 463
464 464
465} // end namespace video 465} // end namespace video
466} // end namespace irr 466} // end namespace irr
467 467
468 468
generated by cgit v1.1 at 2024-08-03 08:12:09 +0000