Changeset 3045 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/treeanimation.cg

Timestamp:

10/19/08 23:42:15 (16 years ago)

Author:

mattausch

Message:

 

File:

• GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/treeanimation.cg (modified) (6 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/shaders/treeanimation.cg

@@ -1 @@
-//--------------------------------------------------------------------------------------
-// Input and Output structs
-//--------------------------------------------------------------------------------------
+/***********************************************/
+/*     Vertex shaders for tree animation       */
+/***********************************************/
 
 
@@ -7 +7 @@
 {
         float4 position: POSITION;
-        float3 normal: NORMAL;
+        float4 normal: NORMAL;
+        
         float4 color: COLOR;
+        //float4 color1: COLOR1;
+
         float4 texCoord: TEXCOORD0;
 };
@@ -19 +22 @@
 
         float4 color: COLOR0;  
+        //float4 color1: COLOR1;  
         float4 eyePos: TEXCOORD1; // eye position
         float3 normal: TEXCOORD2;
@@ -24 +28 @@
 
 
-//--------------------------------------------------------------------------------------
-// Vertex Shaders
-//--------------------------------------------------------------------------------------
-
-
+/** Vertex shader which conducts an simple tree animation
+        that bends the tree depending quadratically on the height
+*/
 vtxout animateVtx(vtxin IN,
                                   uniform float3 windDir,
@@ -34 +36 @@
                                   uniform float frequency,
                                   uniform float2 minMaxPos,
-                                  uniform float timer)
+                                  uniform float timer,
+                                  uniform float3 lightDir)
 {
         vtxout OUT;
 
-        OUT.color = float4(0);//IN.color;
+/*
+// Transform vertex position into homogenous clip-space.
+OUT.HPosition = mul(ModelViewProj, IN.Position);
+// Transform normal from model-space to view-space.
+float3 normalVec = normalize(mul(ModelViewIT,
+IN.Normal).xyz);
+// Store normalized light vector.
+float3 lightVec = normalize(LightVec.xyz);
+// Calculate half angle vector.
+float3 eyeVec = float3(0.0, 0.0, 1.0);
+float3 halfVec = normalize(lightVec + eyeVec);
+// Calculate diffuse component.
+float diffuse = dot(normalVec, lightVec);
+// Calculate specular component.
+float specular = dot(normalVec, halfVec);
+// Use the lit function to compute lighting vector from
+// diffuse and specular values.
+float4 lighting = lit(diffuse, specular, 32);
+// Blue diffuse material
+float3 diffuseMaterial = float3(0.0, 0.0, 1.0);
+// White specular material
+float3 specularMaterial = float3(1.0, 1.0, 1.0);
+// Combine diffuse and specular contributions and
+// output final vertex color.
+OUT.Color.rgb = lighting.y * diffuseMaterial +
+lighting.z * specularMaterial;
+OUT.Color.a = 1.0;
+return OUT;
+}
+*/
         OUT.texCoord = IN.texCoord;
                 
         const float pos = (minMaxPos.x - IN.position.z) / (minMaxPos.x - minMaxPos.y);
+        float factor = pos * pos * windStrength * sin(timer * frequency);
 
+        // transform the vertex position into post projection space
+        OUT.position = mul(glstate.matrix.mvp, IN.position);
+        // displace the input position
+        OUT.position += float4(factor * windDir, 0);
+
+        OUT.normal = mul(glstate.matrix.invtrans.modelview[0], IN.normal);
+
+        Out.color = IN.color * max(0, dot(OUT.normal, lightDir));
+        //OUT.color1 = IN.color1;
+
+        return OUT;
+}
+
+/** vertex shader which conducts an simple tree animation
+        that bends the tree depending quadratically on the height
+        This version of the shader is used for deferred shading and thus only 
+        displaces the vertices and outputs the color, put does not do any shading.
+*/
+vtxout animateVtxMrt(vtxin IN,
+                                         uniform float3 windDir,
+                                         uniform float windStrength,
+                                         uniform float frequency,
+                                         uniform float2 minMaxPos,
+                                         uniform float timer)
+{
+        vtxout OUT;
+
+        OUT.color = IN.color;
+        //OUT.color1 = IN.color1;
+
+        OUT.texCoord = IN.texCoord;
+                
+        const float pos = (minMaxPos.x - IN.position.z) / (minMaxPos.x - minMaxPos.y);
         float factor = pos * pos * windStrength * sin(timer * frequency);
 
@@ -54 +120 @@
         OUT.eyePos += float4(factor * windDir, 0);
 
-        OUT.normal = IN.normal;
-
+        OUT.normal = mul(glstate.matrix.invtrans.modelview[0], IN.normal);
+        
         return OUT;
 }