Make fogColor in the fog tutorial a parameter (#5672)

* uniform fogColor

fogColor is now a parameter

* use new fog color parameter

* convert ambient to Vector4

Author: devel60-alt

examples/shaders/resources/shaders/glsl330/fog.fs

@@ -37,6 +37,7 @@ struct Light {
 uniform Light lights[MAX_LIGHTS];
 uniform vec4 ambient;
 uniform vec3 viewPos;
+uniform vec4 fogColor;
 uniform float fogDensity;
 
 void main()
@@ -77,10 +78,6 @@ void main()
     // Fog calculation
     float dist = length(viewPos - fragPosition);
 
-    // these could be parameters...
-    const vec4 fogColor = vec4(0.5, 0.5, 0.5, 1.0);
-    //const float fogDensity = 0.16;
-
     // Exponential fog
     float fogFactor = 1.0/exp((dist*fogDensity)*(dist*fogDensity));
 

examples/shaders/shaders_fog_rendering.c

@@ -72,8 +72,13 @@ int main(void)
     shader.locs[SHADER_LOC_VECTOR_VIEW] = GetShaderLocation(shader, "viewPos");
 
     // Ambient light level
+    Vector4 ambient = (Vector4){ 0.2f, 0.2f, 0.2f, 1.0f };
     int ambientLoc = GetShaderLocation(shader, "ambient");
-    SetShaderValue(shader, ambientLoc, (float[4]){ 0.2f, 0.2f, 0.2f, 1.0f }, SHADER_UNIFORM_VEC4);
+    SetShaderValue(shader, ambientLoc, &ambient, SHADER_UNIFORM_VEC4);
+
+    Vector4 fogColor = ColorNormalize(GRAY);
+    int fogColorLoc = GetShaderLocation(shader, "fogColor");
+    SetShaderValue(shader, fogColorLoc, &fogColor, SHADER_UNIFORM_VEC4);
 
     float fogDensity = 0.15f;
     int fogDensityLoc = GetShaderLocation(shader, "fogDensity");