make sure gloss never calculates 0^0

[xonotic/darkplaces.git] / dpsoftrast.c

diff --git a/dpsoftrast.c b/dpsoftrast.c
index 2c101fc2d79888cf7ac73133e9d6e0a48d1b16a0..d1cde7a915720f724a12d8f4bc72495a6b879f4b 100644 (file)
--- a/dpsoftrast.c
+++ b/dpsoftrast.c
@@ -107,6 +107,8 @@ static void *MM_CALLOC(size_t nmemb, size_t size)
 #define MM_FREE free
 #endif
 
+#define DPSOFTRAST_FLT_MIN 0.000000000000000001f
+
 typedef enum DPSOFTRAST_ARRAY_e
 {
        DPSOFTRAST_ARRAY_POSITION,
@@ -3855,7 +3857,7 @@ void DPSOFTRAST_PixelShader_LightDirection(DPSOFTRAST_State_Thread *thread, cons
                                specularnormal[2] = lightnormal[2] + eyenormal[2];
                                DPSOFTRAST_Vector3Normalize(specularnormal);
 
-                               specular = DPSOFTRAST_Vector3Dot(surfacenormal, specularnormal);if (specular < 0.0f) specular = 0.0f;
+                               specular = DPSOFTRAST_Vector3Dot(surfacenormal, specularnormal);if (specular < DPSOFTRAST_FLT_MIN) specular = DPSOFTRAST_FLT_MIN;
                        }
 
                        specular = pow(specular, SpecularPower * glosstex[3]);
@@ -4264,7 +4266,7 @@ void DPSOFTRAST_PixelShader_LightSource(DPSOFTRAST_State_Thread *thread, const D
                                specularnormal[2] = lightnormal[2] + eyenormal[2];
                                DPSOFTRAST_Vector3Normalize(specularnormal);
 
-                               specular = DPSOFTRAST_Vector3Dot(surfacenormal, specularnormal);if (specular < 0.0f) specular = 0.0f;
+                               specular = DPSOFTRAST_Vector3Dot(surfacenormal, specularnormal);if (specular < DPSOFTRAST_FLT_MIN) specular = DPSOFTRAST_FLT_MIN;
                        }
                        specular = pow(specular, SpecularPower * glosstex[3]);