1 files changed, 20 insertions, 1 deletions
diff --git a/example/fragmentshader.glsl b/example/fragmentshader.glsl
index d15860a..70c55b5 100644
--- a/example/fragmentshader.glsl
+++ b/example/fragmentshader.glsl
@@ -1,6 +1,25 @@
 #version 130
 out vec4 outpix;
+uniform vec3 campos;
+uniform vec3 lightpos;
+//varing blends them it is transformed to world space
+varying vec4 fragpos;
+varying vec4 fragnormal;
 void main() 
 {
-	outpix = vec4(1.0, 0.0, 0.0, 0.5);
+	vec3 lightnormal = normalize((lightpos - vec3(fragpos.x, fragpos.y, fragpos.z)));
+	float diffuse = dot(lightnormal, vec3(fragnormal.x, fragnormal.y, fragnormal.z));
+	if (diffuse < 0.0) {
+		diffuse = 0.0;
+	}
+	vec3 camnormal = normalize(campos - vec3(fragpos.x, fragpos.y, fragpos.z));
+	float reflect = dot(camnormal, fragnormal.xyz);
+	diffuse = pow(diffuse, 2.0);
+	reflect = pow(reflect, 2.0);
+	float light = .4 * reflect + .6 * diffuse;
+	//this should be the vertex in camera space without the w value
+	//outpix = gl_FragCoord;
+	outpix = vec4(light * 1.0,light *  1.0,light * 1.0, 1.0);
+	//outpix = vec4(fragpos.x ,fragpos.y ,fragpos.z, 0.5);
+	//outpix = vec4(fragnormal.x, fragnormal.y, fragnormal.z, 0.5);
 }