add linear_extrude() function to make.py. rotate_extrude() now takes the number of rotational steps to extrude instead of the angle step size. updated documention in make.py.

1 files changed, 7 insertions, 4 deletions

diff --git a/src/intersect.h b/src/intersect.h
index d2f54ce..26e1d7e 100644
--- a/src/intersect.h
+++ b/src/intersect.h
@@ -60,17 +60,20 @@ __device__ bool intersect_triangle(const float3 &origin, const float3 &direction
    angle between the ray and the plane normal to determine the brightness.
 
    `direction` must be normalized. */
-__device__ unsigned int get_color(const float3 &direction, const float3 &v0, const float3& v1, const float3 &v2, const unsigned int base_color=0xFFFFFFFF)
+__device__ unsigned int get_color(const float3 &direction, const float3 &v0, const float3& v1, const float3 &v2, unsigned int base_color=0xFFFFFF)
 {
 	float scale = dot(normalize(cross(v1-v0,v2-v1)),-direction);
 
+	if (scale < 0.0f)
+	{
+		base_color = 0xff0000;
+		scale = dot(-normalize(cross(v1-v0,v2-v1)),-direction);
+	}
+
 	unsigned int r = 0xFF & (base_color >> 16);
 	unsigned int g = 0xFF & (base_color >> 8);
 	unsigned int b = 0xFF & base_color;
 
-	if (scale < 0.0f)
-		scale = dot(-normalize(cross(v1-v0,v2-v1)),-direction);
-
 	r = floorf(r*scale);
 	g = floorf(g*scale);
 	b = floorf(b*scale);