Almost finished working commit

4 files changed, 82 insertions, 0 deletions

diff --git a/shaders/earth.fp b/shaders/earth.fp
new file mode 100644
index 0000000..c8d6d2a
--- /dev/null
+++ b/shaders/earth.fp
@@ -0,0 +1,36 @@
+//  Set the fragment color
+
+uniform sampler2D tex;
+
+varying vec3 fragmentNormal ;
+varying vec3 lightVector ;
+varying vec3 cameraVector ;
+
+void main()
+{
+    vec3 fragNormal = normalize( fragmentNormal ) ;
+
+    float f = dot( fragNormal, normalize( lightVector  ) );
+    float c = dot( fragNormal, normalize( cameraVector ) );
+    c = (c - 0.5) * 2.0 ;
+
+    vec4 color = texture2D(tex,gl_TexCoord[0].xy + vec2( 0.5, -0.2 ));
+
+    float bluef = (1.0f / (1.0f + exp(-f * 150.0f)));
+
+    float bluef2  = (1.0f / (1.0f + exp(c * 20.0f))) * f;
+    float redf2   = (1.0f / (1.0f + exp(c * 20.0f))) * pow(f,2) * f;
+    float greenf2 = redf2;
+
+    float alpha   = (1.0f / (1.0f + exp(c * 30.0f))) * f;
+    
+    /* Each color has its own drop off rate */
+    float greenf = (1.0f / (1.0f + exp(-f * 60.0f)));
+    float redf   = (1.0f / (1.0f + exp(-f * 30.0f)));
+
+    gl_FragColor = vec4(
+        redf*color[0] + 1000.0*redf2,
+        greenf*color[1] + 1000.0*greenf2,
+        bluef*color[2] + 1000.0*bluef2,
+        1.0-1000.0*alpha );
+}
diff --git a/shaders/earth.vp b/shaders/earth.vp
new file mode 100644
index 0000000..502a970
--- /dev/null
+++ b/shaders/earth.vp
@@ -0,0 +1,22 @@
+/* Light position of Sun */
+uniform vec3 lightPos ;
+
+/* Position of the -x axis */
+uniform vec3 cameraPos ;
+
+varying vec3 fragmentNormal;
+varying vec3 lightVector;
+varying vec3 cameraVector ;
+
+void main() {
+    /* Set the vectors and get the normal */
+    fragmentNormal = gl_Normal;
+    lightVector = lightPos - gl_Vertex.xyz;
+    cameraVector = cameraPos - gl_Vertex.xyz;
+    
+    /* Texture */
+    gl_TexCoord[0] = gl_MultiTexCoord0;
+    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
+}
+
+
diff --git a/shaders/moon.fp b/shaders/moon.fp
new file mode 100644
index 0000000..18242d2
--- /dev/null
+++ b/shaders/moon.fp
@@ -0,0 +1,13 @@
+uniform sampler2D tex;
+
+varying vec3 fragmentNormal ;
+varying vec3 lightVector ;
+
+void main() {
+	float f = dot( normalize( fragmentNormal ), normalize( lightVector ) );
+	vec4 color = texture2D( tex, gl_TexCoord[0].xy );
+
+	f = ( 1.0f / (1.0f + exp( -f * 150.0f ) ) ) ;
+
+	gl_FragColor = f * color;
+}
diff --git a/shaders/moon.vp b/shaders/moon.vp
new file mode 100644
index 0000000..11fef10
--- /dev/null
+++ b/shaders/moon.vp
@@ -0,0 +1,11 @@
+uniform vec3 lightPos ;
+
+varying vec3 fragmentNormal ;
+varying vec3 lightVector ;
+
+void main() {
+	fragmentNormal = gl_Normal ;
+	lightVector = lightPos - gl_Vertex.xyz ;
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex ;
+}