easymesh: per-fragment lighting in the HLSL shader (PS3, Xbox 360).

src/easymesh/shiny.lolfx

@@ -42,7 +42,8 @@ varying vec4 pass_Color;
 // FIXME: the light direction should be passed in the code
 vec3 in_LightDir = vec3(0.3, 0.3, 0.7);
 
-void main(void) {
+void main(void)
+{
     /* Material properties */
     vec3 specular_reflect = vec3(0.8, 0.75, 0.4);
     float specular_power = 60.0;
@@ -79,47 +80,60 @@ void main(float3 in_Vertex : POSITION,
           uniform float4x4 in_ModelView,
           uniform float4x4 in_Proj,
           uniform float3x3 in_NormalMat,
+          out float4 pass_Eye : TEXCOORD0,
+          out float3 pass_TNormal : TEXCOORD1,
+          out float4 pass_Color : COLOR,
+          out float4 out_Position : POSITION)
+{
+    float4 eye = mul(in_ModelView, float4(in_Vertex, 1.0));
+    float3 tnorm = normalize(mul(in_NormalMat, in_Normal));
+
+    pass_Eye = eye;
+    pass_TNormal = tnorm;
+#ifdef _XBOX
+    pass_Color = in_Color.abgr;
+#else
+    pass_Color = in_Color;
+#endif
+
+    out_Position = mul(in_Proj, eye);
+}
+
+-- HLSL.Frag --
+
+void main(float4 pass_Eye : TEXCOORD0,
+          float3 pass_TNormal : TEXCOORD1,
+          float4 pass_Color : COLOR,
           uniform float in_Damage,
-          out float4 out_Position : POSITION,
-          out float4 pass_Color : COLOR)
+          out float4 out_FragColor : COLOR)
 {
-    float3 in_LightDir = normalize(float3(0.3, 0.3, 0.7));
+    float3 in_LightDir = float3(0.3, 0.3, 0.7);
 
+    /* Material properties */
     float3 specular_reflect = float3(0.8, 0.75, 0.4);
     float specular_power = 60.0;
+
+    /* World properties */
     float ambient_mul = 0.5;
     float3 ambient_color = float3(0.25, 0.2, 0.35);
     float3 diffuse_color = float3(1.0, 1.0, 0.6);
     float3 specular_color = float3(1.0, 1.0, 0.6);
-    float3 tnorm = normalize(mul(in_NormalMat, in_Normal));
-    float4 eye = mul(in_ModelView, float4(in_Vertex, 1.0));
-    float3 s = in_LightDir;
-    float3 v = normalize(-eye.xyz);
-    float3 r = reflect(-s, tnorm);
+
+    float3 s = normalize(in_LightDir); /* normalize(pass_Eye - lightpos); */
+    float3 v = normalize(-pass_Eye.xyz);
+    float3 r = reflect(-s, pass_TNormal);
+
     float3 ambient = ambient_color;
-    float sdotn = max(dot(s, tnorm), 0.0);
+    float sdotn = max(dot(s, pass_TNormal), 0.0);
     float3 diffuse = diffuse_color * sdotn;
     float3 specular = float3(0.0, 0.0, 0.0);
     if (sdotn > 0.0)
         specular = specular_color * specular_reflect
                  * pow(max(dot(r, v), 0.0), specular_power);
     float3 light = ambient + diffuse + specular;
-#ifdef _XBOX
-    float4 real_color = in_Color.abgr;
-#else
-    float4 real_color = in_Color;
-#endif
-    real_color = in_Damage * float4(1.2, 1.2, 1.2, 1.0)
-               + (1.0 - in_Damage) * real_color;
-    pass_Color = real_color * float4(light, 1.0);
-    out_Position = mul(in_Proj, eye);
-}
 
-
-void main(float4 pass_Color : COLOR,
-          out float4 out_FragColor : COLOR)
-{
-    out_FragColor = pass_Color;
+    float4 real_color = in_Damage * float4(1.2, 1.2, 1.2, 1.0)
+                      + (1.0 - in_Damage) * pass_Color;
+    out_FragColor = real_color * float4(light, 1.0);
 }