1 files changed, 54 insertions, 0 deletions
diff --git a/advanced_lighting/6.hdr/shaders/blinn.frag b/advanced_lighting/6.hdr/shaders/blinn.frag
new file mode 100644
index 0000000..5dca1f7
--- /dev/null
+++ b/advanced_lighting/6.hdr/shaders/blinn.frag
@@ -0,0 +1,54 @@
+#version 330 core
+
+in VS_OUT {
+	vec3		fpos;
+	vec3		fn;
+	vec2		texc;
+} fsin;
+
+out vec4		fcolor;
+
+uniform sampler2D	diftex;
+
+const int		lmax = 30;
+
+uniform int		lcount;
+uniform	vec3		lpos[lmax];
+uniform vec3		vpos;
+
+void main(void)
+{
+	vec3	l, v, n, difcolor, lcolor, ambient, halfdir, result;
+	float	diff, spec, specf, dist, attenuation;
+	int	i;
+
+	n = normalize(fsin.fn);
+	v = normalize(vpos-fsin.fpos);
+
+	ambient = vec3(0.001);
+
+	difcolor = vec3(texture(diftex, fsin.texc));
+
+	/* lcolor = vec3(0.3, 0.0, 0.1); */
+	lcolor = vec3(1.0);
+
+	specf = 0.2;
+
+	result = vec3(0.0);
+
+	for (i = 0; i < lcount; i++) {
+		l = normalize(lpos[i]-fsin.fpos);
+		halfdir = normalize(l+v);
+
+		diff = max(dot(n, l), 0.0);
+
+		spec = pow(max(dot(n, halfdir), 0.0), 16.0)*specf;
+
+		dist = length(lpos[i]-fsin.fpos);
+		attenuation = 1.0/dist;
+
+		result += (diff+spec)*difcolor*lcolor*attenuation;
+	}
+
+	fcolor = vec4(ambient+result, 1.0);
+}