1 files changed, 117 insertions, 0 deletions
diff --git a/src/rend2/glsl/fogpass_vp.glsl b/src/rend2/glsl/fogpass_vp.glsl
new file mode 100644
index 00000000..f18bc707
--- /dev/null
+++ b/src/rend2/glsl/fogpass_vp.glsl
@@ -0,0 +1,117 @@
+attribute vec4  attr_Position;
+attribute vec3  attr_Normal;
+attribute vec4  attr_TexCoord0;
+
+//#if defined(USE_VERTEX_ANIMATION)
+attribute vec4  attr_Position2;
+attribute vec3  attr_Normal2;
+//#endif
+
+uniform vec4    u_FogDistance;
+uniform vec4    u_FogDepth;
+uniform float   u_FogEyeT;
+
+//#if defined(USE_DEFORM_VERTEXES)
+uniform int     u_DeformGen;
+uniform float   u_DeformParams[5];
+//#endif
+
+uniform float   u_Time;
+uniform mat4    u_ModelViewProjectionMatrix;
+
+//#if defined(USE_VERTEX_ANIMATION)
+uniform float   u_VertexLerp;
+//#endif
+
+varying float   var_Scale;
+
+#if defined(USE_DEFORM_VERTEXES)
+vec3 DeformPosition(const vec3 pos, const vec3 normal, const vec2 st)
+{
+	if (u_DeformGen == 0)
+	{
+		return pos;
+	}
+
+	float base =      u_DeformParams[0];
+	float amplitude = u_DeformParams[1];
+	float phase =     u_DeformParams[2];
+	float frequency = u_DeformParams[3];
+	float spread =    u_DeformParams[4];
+
+	if (u_DeformGen == DGEN_BULGE)
+	{
+		phase *= M_PI * 0.25 * st.x;
+	}
+	else // if (u_DeformGen <= DGEN_WAVE_INVERSE_SAWTOOTH)
+	{
+		phase += dot(pos.xyz, vec3(spread));
+	}
+
+	float value = phase + (u_Time * frequency);
+	float func;
+
+	if (u_DeformGen == DGEN_WAVE_SIN)
+	{
+		func = sin(value * 2.0 * M_PI);
+	}
+	else if (u_DeformGen == DGEN_WAVE_SQUARE)
+	{
+		func = sign(sin(value * 2.0 * M_PI));
+	}
+	else if (u_DeformGen == DGEN_WAVE_TRIANGLE)
+	{
+		func = abs(fract(value + 0.75) - 0.5) * 4.0 - 1.0;
+	}
+	else if (u_DeformGen == DGEN_WAVE_SAWTOOTH)
+	{
+		func = fract(value);
+	}
+	else if (u_DeformGen == DGEN_WAVE_INVERSE_SAWTOOTH)
+	{
+		func = (1.0 - fract(value));
+	}
+	else if (u_DeformGen == DGEN_BULGE)
+	{
+		func = sin(value);
+	}
+
+	return pos + normal * (base + func * amplitude);
+}
+#endif
+
+float CalcFog(vec4 position)
+{
+	float s = dot(position, u_FogDistance) * 8.0;
+	float t = dot(position, u_FogDepth);
+
+	if (t < 1.0)
+	{
+		t = step(step(0.0, -u_FogEyeT), t);
+	}
+	else
+	{
+		t /= t - min(u_FogEyeT, 0.0);
+	}
+	
+	return s * t;
+}
+
+void main()
+{
+#if defined(USE_VERTEX_ANIMATION)
+	vec4 position = mix(attr_Position, attr_Position2, u_VertexLerp);
+	vec3 normal = normalize(mix(attr_Normal, attr_Normal2, u_VertexLerp));
+#else
+	vec4 position = attr_Position;
+	vec3 normal = attr_Normal;
+#endif
+
+#if defined(USE_DEFORM_VERTEXES)
+	position.xyz = DeformPosition(position.xyz, normal, attr_TexCoord0.st);
+#endif
+
+	gl_Position = u_ModelViewProjectionMatrix * position;
+
+	var_Scale = CalcFog(position);
+}