WorldViz User Forum - Specular Shader Issue

Hello,

I was wondering if I could get a help with a Specular Shader problem.

I made a shader in the program AMD RenderMonkey, which if you are not familiar with is a 'sandbox' for making shaders and testing them out.

Everything works fine in RenderMonkey, but I run into the issue of nothing
rendering when I move into Vizard.

My Vertex Shader is:

Code:

//Uniform 



uniform vec3 LightPosition;

uniform vec3 EyePosition;

//Varying



varying vec3 ViewDirection;

varying vec3 LightDirection;

varying vec3 Normal;

varying vec2 Texcoord;

//Attributes



void main(void)

{

   gl_Position = ftransform();

   

   Texcoord = gl_MultiTexCoord0.xy;

   

   vec4 objectPosition = gl_ModelViewMatrix * gl_Vertex;

   

   LightDirection = (gl_ModelViewMatrix * vec4(LightPosition, 1)).xyz - objectPosition.xyz;

   ViewDirection = EyePosition - objectPosition.xyz;

   Normal = gl_NormalMatrix * gl_Normal;

}

My Fragment Shader:

Code:

uniform vec4 Diffuse;

uniform vec4 Ambient;

uniform vec4 Specular;

uniform vec3 LightPosition;

uniform vec3 EyePosition;

uniform float SpecularPower;



uniform sampler2D TexMap;

uniform sampler2D SpecMap;



varying vec3 LightDirection;

varying vec3 ViewDirection;

varying vec3 Normal;



varying vec2 Texcoord;



void main(void)

{

   vec3 nLightDirection = normalize(LightDirection);

   vec3 nNormal = normalize(Normal);

   

   float NDotL = dot(nNormal, nLightDirection);

  

   vec3 Reflection = normalize(((2.0 * nNormal) * NDotL) - nLightDirection); 

   vec3 nViewDirection = normalize(ViewDirection);

   float RDotV = max(0.0,dot(Reflection, nViewDirection));

   

   

   vec4 diffColor = texture2D(TexMap,Texcoord);

   vec4 specColor = texture2D(SpecMap, Texcoord);

   

   vec4 DiffuseColor = diffColor * Diffuse * NDotL;

   vec4 AmbientColor = Ambient * diffColor;

   vec4 SpecularColor = (Specular * (pow(RDotV, SpecularPower))) * specColor;

   

   gl_FragColor = DiffuseColor + AmbientColor + SpecularColor;

}

And my Vizard code for bringing in the shader and attaching it to the model:

Code:

import viz



viz.go()



shader = viz.addShader(flag = 0, vert = "SpecMap.vp", frag = "SpecMap.fp")



viz.MainView.eyeheight(0.0)



#Load model

trex = viz.add("TREX//TRex.CFG")



trex2 = viz.add('sphere.obj')

trex2.setPosition(15,0,0)

#Load Textures

TexMap = viz.addTexture('TRexTex_10_TexMap.bmp')

SpecMap = viz.addTexture('TRexTex_10_SpecMap.bmp')



#Attach textures

trex.texture(TexMap, '', 0)

trex.texture(SpecMap, '', 1)



trex2.texture(TexMap, '', 0)

trex2.texture(SpecMap, '', 1)



#Vertex Uniforms

EyePosition = viz.addUniformFloat('EyePosition', [0.0,0.0,0.0])

LightPosition = viz.addUniformFloat('fvLightPosition', [100,200,100])



#Fragment Uniforms

Diffuse = viz.addUniformFloat('Diffuse',[1.0,1.0,1.0,1.0])

Ambient = viz.addUniformFloat('Ambient',[1.0,1.0,1.0,1.0])

Specular = viz.addUniformFloat('Specular', [1.0,1.0,1.0,1.0])

SpecularPower = viz.addUniformFloat('SpecularPower', 3)



Texture =  viz.addUniformInt( 'TexMap', 0 )

SpecularMap = viz.addUniformInt( 'SpecMap', 1 )



shader.attach(Texture)

shader.attach(SpecularMap)



trex.apply(shader)

trex2.apply(shader)