fragment shader: implement blinn-phong

1 files changed, 3 insertions, 3 deletions

diff --git a/frag.glsl b/frag.glsl
index ff88e1f..2f0a367 100644
--- a/frag.glsl
+++ b/frag.glsl
@@ -22,11 +22,11 @@ void main()
 	vec3 lidir = normalize(lipos - fpos);
 	float dif = max(dot(norm, lidir), 0.0);
 
-	float spestr = 0.5;
+	float speen = max(sign(dot(lidir, norm)), 0.0);
 	vec3 vwdir = normalize(-fpos);
-	vec3 redir = reflect(-lidir, norm);
+	vec3 mid = normalize(lidir + vwdir);
 
-	float spe = spestr * pow(max(dot(vwdir, redir), 0.0), 32);
+	float spe = pow(max(dot(norm, mid), 0.0), 256) * speen;
 
 	color = vec4((amb + dif + spe) * lico * objco, 1.0);
 }