From a4fa46a4fda967348ea18961c177330491bdb953 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Tue, 15 Dec 2009 02:25:40 +0100
Subject: Added nice lighting shaders

---
 shader/default.frag | 44 ++++++++++++++++++++++++++++++++++++++++++++
 shader/default.vert | 25 +++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 shader/default.frag
 create mode 100644 shader/default.vert

(limited to 'shader')

diff --git a/shader/default.frag b/shader/default.frag
new file mode 100644
index 0000000..b39b46d
--- /dev/null
+++ b/shader/default.frag
@@ -0,0 +1,44 @@
+uniform sampler2D tex;
+
+varying vec4 diffuse, ambientGlobal, ambient;
+varying vec3 normal, pos;
+/*varying vec3 normal, lightVector, reflectVector, eyeVector;*/
+
+
+void main() {
+  vec3 n, l, refl, eye;
+  float NdotL, RdotE;
+  vec4 color, specularColor;
+  float dist, att, specularFactor;
+  
+  color = ambientGlobal;
+  
+  n = normalize(normal);
+  
+  l = gl_LightSource[0].position.xyz - pos;
+  
+  dist = length(l);
+  l /= dist;
+  
+  /* compute the dot product between normal and normalized lightdir */
+  NdotL = max(dot(n, l), 0.0);
+
+  if (NdotL > 0.0) {
+    att = 1.0 / (gl_LightSource[0].constantAttenuation +
+        gl_LightSource[0].linearAttenuation * dist +
+        gl_LightSource[0].quadraticAttenuation * dist * dist);
+    color += att * (diffuse * NdotL + ambient);
+    
+    refl = normalize(reflect(-l, n));
+    eye = normalize(-pos);
+    
+    RdotE = max(dot(refl, eye), 0.0);
+    specularFactor = att * pow(RdotE, gl_FrontMaterial.shininess);
+    specularColor = specularFactor * gl_FrontMaterial.specular * gl_LightSource[0].specular;
+  }
+  else {
+    specularColor = vec4(0, 0, 0, 1);
+  }
+  
+  gl_FragColor = color * texture2D(tex, gl_TexCoord[0].st) + specularColor;
+}
diff --git a/shader/default.vert b/shader/default.vert
new file mode 100644
index 0000000..133c871
--- /dev/null
+++ b/shader/default.vert
@@ -0,0 +1,25 @@
+varying vec4 diffuse, ambientGlobal, ambient;
+varying vec3 normal, pos;
+/*varying vec3 normal, lightVector, reflectVector, eyeVector;*/
+
+
+void main() {
+  normal = normalize(gl_NormalMatrix * gl_Normal);
+  
+  pos = vec3(gl_ModelViewMatrix * gl_Vertex);
+  /*lightVector = vec3(gl_LightSource[0].position - ecPos);
+  
+  reflectVector = normalize(reflect(-lightVector, normal));
+  eyeVector = vec3(-ecPos);*/
+  
+  /* Compute the diffuse, ambient and globalAmbient terms */
+  diffuse = gl_FrontMaterial.diffuse * gl_LightSource[0].diffuse;
+  
+  /* The ambient terms have been separated since one of them */
+  /* suffers attenuation */
+  ambient = gl_FrontMaterial.ambient * gl_LightSource[0].ambient;
+  ambientGlobal = gl_LightModel.ambient * gl_FrontMaterial.ambient;
+  
+  gl_TexCoord[0] = gl_MultiTexCoord0;
+  gl_Position = ftransform();
+}
-- 
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