Merge branch 'support-code' of https://github.umn.edu/umn-csci-4611-f21/shared-upstream

1 files changed, 29 insertions, 0 deletions

diff --git a/dev/a6-harold/shaders/artsy.frag b/dev/a6-harold/shaders/artsy.frag
new file mode 100644
index 0000000..403009d
--- /dev/null
+++ b/dev/a6-harold/shaders/artsy.frag
@@ -0,0 +1,29 @@
+#version 330
+
+in vec3 Position;
+in vec3 Normal;
+
+out vec4 color;
+
+uniform vec3 lightPosition;
+uniform vec4 Ia, Id, Is;
+
+uniform vec4 ka, kd, ks;
+uniform float s;
+
+uniform sampler2D diffuseRamp;
+uniform sampler2D specularRamp;
+
+
+void main() {
+    vec3 l = normalize(lightPosition.xyz - Position);
+    vec3 n = normalize(Normal);
+    vec3 e = normalize(-Position);
+    vec3 h = normalize(e + l);
+    float diffuse = (dot(l,n) + 1)/2;
+    float specular = pow(max(dot(n,h),0), s);
+    color = ka*Ia
+          + kd*Id*texture(diffuseRamp, vec2(diffuse,0))
+          + ks*Is*texture(specularRamp, vec2(specular,0));
+    color.a = 1;
+}