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https://github.com/ZDoom/gzdoom.git
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72 lines
2.5 KiB
Text
72 lines
2.5 KiB
Text
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in vec4 aPosition;
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in vec2 aTexCoord;
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in vec4 aColor;
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#ifndef SIMPLE // we do not need these for simple shaders
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in vec4 aVertex2;
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out vec4 pixelpos;
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out vec2 glowdist;
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#endif
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out vec4 vTexCoord;
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out vec4 vColor;
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void main()
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{
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#ifndef SIMPLE
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vec4 worldcoord = ModelMatrix * mix(aPosition, aVertex2, uInterpolationFactor);
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#else
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vec4 worldcoord = ModelMatrix * aPosition;
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#endif
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vec4 eyeCoordPos = ViewMatrix * worldcoord;
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vColor = aColor;
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#ifndef SIMPLE
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pixelpos.xyz = worldcoord.xyz;
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pixelpos.w = -eyeCoordPos.z/eyeCoordPos.w;
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glowdist.x = -((uGlowTopPlane.w + uGlowTopPlane.x * worldcoord.x + uGlowTopPlane.y * worldcoord.z) * uGlowTopPlane.z) - worldcoord.y;
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glowdist.y = worldcoord.y + ((uGlowBottomPlane.w + uGlowBottomPlane.x * worldcoord.x + uGlowBottomPlane.y * worldcoord.z) * uGlowBottomPlane.z);
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if (uSplitBottomPlane.z != 0.0)
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{
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gl_ClipDistance[3] = -((uSplitTopPlane.w + uSplitTopPlane.x * worldcoord.x + uSplitTopPlane.y * worldcoord.z) * uSplitTopPlane.z) - worldcoord.y;
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gl_ClipDistance[4] = worldcoord.y + ((uSplitBottomPlane.w + uSplitBottomPlane.x * worldcoord.x + uSplitBottomPlane.y * worldcoord.z) * uSplitBottomPlane.z);
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}
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#endif
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#ifdef SPHEREMAP
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vec3 u = normalize(eyeCoordPos.xyz);
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vec4 n = normalize(TextureMatrix * vec4(aTexCoord.x, 0.0, aTexCoord.y, 0.0)); // use texture matrix and coordinates for our normal. Since this is only used on walls, the normal's y coordinate is always 0.
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vec3 r = reflect(u, n.xyz);
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float m = 2.0 * sqrt( r.x*r.x + r.y*r.y + (r.z+1.0)*(r.z+1.0) );
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vec2 sst = vec2(r.x/m + 0.5, r.y/m + 0.5);
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vTexCoord.xy = sst;
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#else
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vTexCoord = TextureMatrix * vec4(aTexCoord, 0.0, 1.0);
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#endif
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gl_Position = ProjectionMatrix * eyeCoordPos;
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#if defined __GLSL_CG_DATA_TYPES && defined GLSL12_COMPATIBILE
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gl_ClipVertex = eyeCoordPos;
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#endif
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if (uClipHeightDirection != 0.0) // clip planes used for reflective flats
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{
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gl_ClipDistance[0] = (worldcoord.y - uClipHeight) * uClipHeightDirection;
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}
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else if (uClipLine.x > -1000000.0) // and for line portals - this will never be active at the same time as the reflective planes clipping so it can use the same hardware clip plane.
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{
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gl_ClipDistance[0] = -( (worldcoord.z - uClipLine.y) * uClipLine.z + (uClipLine.x - worldcoord.x) * uClipLine.w ) + 1.0/32768.0; // allow a tiny bit of imprecisions for colinear linedefs.
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}
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// clip planes used for translucency splitting
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gl_ClipDistance[1] = worldcoord.y - uClipSplit.x;
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gl_ClipDistance[2] = uClipSplit.y - worldcoord.y;
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}
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