Fun with shaders

git-svn-id: svn://cook.msm.cam.ac.uk:745/diff-tomo/dtr@235 bf6ca9ba-c028-0410-8290-897cf20841d1

1 files changed, 40 insertions, 0 deletions

diff --git a/data/light-pp.frag b/data/light-pp.frag
new file mode 100644
index 0000000..c862641
--- /dev/null
+++ b/data/light-pp.frag
@@ -0,0 +1,40 @@
+/*
+ * light-pp.frag
+ *
+ * Lighting per pixel
+ *
+ * (c) 2007 Thomas White <taw27@cam.ac.uk>
+ *
+ *  dtr - Diffraction Tomography Reconstruction
+ *
+ */
+
+varying vec4 col_ambi;
+varying vec4 col_diff;
+varying vec4 col_spec;
+varying float shininess;
+
+varying vec3 normal;
+varying vec3 halfvc;
+
+void main() {
+	
+	vec4 ambi;
+	vec4 diff;
+	vec4 spec;
+	
+	/* Ambient contribution */
+	ambi = col_ambi * gl_LightModel.ambient;
+	ambi += col_ambi * gl_LightSource[0].ambient;
+	
+	/* Diffuse contribution */
+	diff = col_diff * clamp(dot( vec3(normalize(gl_LightSource[0].position)), normal ), 0.0, 1.0);
+	
+	/* Specular contribution */
+	spec = col_spec * pow(dot( vec3(normal), halfvc ), shininess);
+	
+	gl_FragColor = ambi + diff + spec;
+	gl_FragColor.a = 1.0;
+	
+}
+