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Shift fog maths to fragment shader to fix bug in virtua on.

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This commit is contained in:
Ian Curtis 2017-11-23 17:51:51 +00:00
parent bddc86aba9
commit 62d9584b0d
1 changed files with 12 additions and 8 deletions
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20
Src/Graphics/New3D/R3DShader.cpp
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@ -8,9 +8,6 @@ static const char *vertexShaderR3D = R"glsl(
#version 120
// uniforms
uniform float fogIntensity;
uniform float fogDensity;
uniform float fogStart;
uniform float modelScale;
// attributes
@ -22,7 +19,6 @@ attribute vec3 inFaceNormal; // used to emulate r3d culling
attribute float inFixedShade;
// outputs to fragment shader
varying float fsFogFactor;
varying vec3 fsViewVertex;
varying vec3 fsViewNormal; // per vertex normal vector
varying vec2 fsTexCoord;
@ -43,9 +39,6 @@ void main(void)
{
fsViewVertex = vec3(gl_ModelViewMatrix * inVertex);
fsViewNormal = (mat3(gl_ModelViewMatrix) * inNormal) / modelScale;
float z = -fsViewVertex.z;
fsFogFactor = fogIntensity * (fogStart + z * fogDensity);
fsDiscard = CalcBackFace(fsViewVertex);
fsColor = inColour;
fsTexCoord = inTexCoord;
@ -83,6 +76,9 @@ uniform bool intensityClamp; // some games such as daytona and
uniform bool specularEnabled; // specular enabled
uniform float specularValue; // specular coefficient
uniform float shininess; // specular shininess
uniform float fogIntensity;
uniform float fogDensity;
uniform float fogStart;
uniform float fogAttenuation;
uniform float fogAmbient;
uniform bool fixedShading;
@ -141,6 +137,14 @@ void Step15Luminous(inout vec4 colour)
}
}
float CalcFog()
{
float z = -fsViewVertex.z;
float fog = fogIntensity * clamp(fogStart + z * fogDensity, 0.0, 1.0);
return fog;
}
void main()
{
vec4 tex1Data;
@ -152,7 +156,7 @@ void main()
discard; //emulate back face culling here
}
fogData = vec4(fogColour.rgb * fogAmbient, clamp(fsFogFactor,0.0,1.0));
fogData = vec4(fogColour.rgb * fogAmbient, CalcFog());
tex1Data = vec4(1.0, 1.0, 1.0, 1.0);
if(textureEnabled) {