#1
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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) |
#2
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In your Vizard code, you are only attaching the texture uniforms to the shader. You need to attach all the other uniforms as well (LightPosition, EyePosition, Diffuse, etc...).
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#3
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Thank you for the keen eye.
Will you be including shader help anytime soon in your documentation? I've had quite a time finding information across this forum and peeking through other people's code. Thanks again, George |
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