From c710dee00c80b2cf95821b2a0382c72450c20a3f Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Sun, 22 May 2011 22:59:01 -0400
Subject: [PATCH] add textured object shader; update names

---
 shaders/{wfobj.f.glsl => obj.fp} |  0
 shaders/{wfobj.v.glsl => obj.vp} |  0
 shaders/obj_tex.fp               | 41 ++++++++++++++++++++++++++++++++
 shaders/obj_tex.vp               | 16 +++++++++++++
 4 files changed, 57 insertions(+)
 rename shaders/{wfobj.f.glsl => obj.fp} (100%)
 rename shaders/{wfobj.v.glsl => obj.vp} (100%)
 create mode 100644 shaders/obj_tex.fp
 create mode 100644 shaders/obj_tex.vp

diff --git a/shaders/wfobj.f.glsl b/shaders/obj.fp
similarity index 100%
rename from shaders/wfobj.f.glsl
rename to shaders/obj.fp
diff --git a/shaders/wfobj.v.glsl b/shaders/obj.vp
similarity index 100%
rename from shaders/wfobj.v.glsl
rename to shaders/obj.vp
diff --git a/shaders/obj_tex.fp b/shaders/obj_tex.fp
new file mode 100644
index 0000000..d07f348
--- /dev/null
+++ b/shaders/obj_tex.fp
@@ -0,0 +1,41 @@
+
+#ifdef GL_FRAGMENT_PRECISION_HIGH
+precision highp float;
+#else
+precision mediump float;
+#endif
+
+uniform vec4 ambient, specular;
+uniform float shininess;
+uniform sampler2D tex;
+
+varying vec3 pos_i;
+varying vec3 normal_i;
+varying vec2 tex_coord_i;
+
+void main(void)
+{
+    vec3 n, lightDir;
+    vec4 color;
+    float NdotL, RdotEye;
+
+    lightDir = normalize(vec3(-0.1, 0, -0.9));
+    color = vec4(0.2, 0.2, 0.2, 1.0) * ambient;  /* ambient light */
+    n = normalize(normal_i);
+
+    NdotL = max(dot(n, -lightDir), 0.0);
+
+    if (NdotL > 0.0)
+    {
+        /* diffuse component */
+        color += texture2D(tex, tex_coord_i) * NdotL;
+        /* specular component */
+        RdotEye = dot(normalize(-pos_i), normalize(reflect(-lightDir, n)));
+        if (RdotEye > 0.0)
+        {
+            color += clamp(specular * pow(RdotEye, shininess), 0.0, 1.0);
+        }
+    }
+
+    gl_FragColor = color;
+}
diff --git a/shaders/obj_tex.vp b/shaders/obj_tex.vp
new file mode 100644
index 0000000..9be4096
--- /dev/null
+++ b/shaders/obj_tex.vp
@@ -0,0 +1,16 @@
+
+attribute vec3 pos;
+attribute vec3 normal;
+attribute vec2 tex_coord;
+
+varying vec3 pos_i;
+varying vec3 normal_i;
+varying vec2 tex_coord_i;
+
+void main(void)
+{
+    gl_Position = gl_ModelViewProjectionMatrix * vec4(pos, 1);
+    pos_i = gl_Position.xyz;
+    tex_coord_i = tex_coord;
+    normal_i = gl_NormalMatrix * normal;
+}