shithub: libgraphics

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add a normal map property to Material.

--- a/graphics.h

+++ b/graphics.h

@@ -108,6 +108,7 @@

 	Color specular;

 	double shininess;

 	Memimage *diffusemap;

+	Memimage *normalmap;

 };

 struct Primitive

--- a/scene.c

+++ b/scene.c

@@ -180,6 +180,13 @@

 				mtl->diffusemap->data->ref++;

 			}

+			if(objmtl->norm != nil){

+				mtl->normalmap = allocmemimaged(objmtl->norm->r, objmtl->norm->chan, objmtl->norm->data);

+				if(mtl->normalmap == nil)

+					sysfatal("allocmemimaged: %r");

+				mtl->normalmap->data->ref++;

+			}

+

 			addmtlmap(&mtlmap, objmtl, m->nmaterials-1);

 		}