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- vWorldNormal is not normalized but R_DoomColormap requires this

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This commit is contained in:
Magnus Norddahl 2018-12-19 11:07:39 +01:00
parent 1a3df8dfba
commit bc648015c7
1 changed files with 4 additions and 3 deletions
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7
wadsrc/static/shaders/glsl/main.fp
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@ -122,12 +122,12 @@ vec4 getTexel(vec2 st)
// Vanilla Doom wall colormap equation
//
//===========================================================================
float R_WallColormap(float lightnum, float z)
float R_WallColormap(float lightnum, float z, vec3 normal)
{
// R_ScaleFromGlobalAngle calculation
float projection = 160.0; // projection depends on SCREENBLOCKS!! 160 is the fullscreen value
vec2 line_v1 = pixelpos.xz; // in vanilla this is the first curline vertex
vec2 line_normal = vWorldNormal.xz;
vec2 line_normal = normal.xz;
float texscale = projection * clamp(dot(normalize(uCameraPos.xz - line_v1), line_normal), 0.0, 1.0) / z;
float lightz = clamp(16.0 * texscale, 0.0, 47.0);
@ -174,7 +174,8 @@ float R_DoomColormap(float light, float z)
if (dot(vWorldNormal.xyz, vWorldNormal.xyz) > 0.5)
{
return mix(R_WallColormap(lightnum, z), R_PlaneColormap(lightnum, z), abs(vWorldNormal.y));
vec3 normal = normalize(vWorldNormal.xyz);
return mix(R_WallColormap(lightnum, z, normal), R_PlaneColormap(lightnum, z), abs(normal.y));
}
else // vWorldNormal is not set on sprites
{