Vert:
uniform mat4 World;uniform mat4 View;uniform mat4 Proj;attribute vec3 tangent;attribute vec3 bitangent;struct lightDataType{ vec4 ambient; vec4 diffuse; vec4 specular; vec4 position; // Position in eye coordinates};varying vec3 tbnDirToLight; // Direction to light in tangent spacevarying vec3 tbnHalfVector; // Half vector in tangent spaceuniform vec3 mEye; //Camera eye in global space?void main (void){ mat4 VP = (Proj * View); mat4 WVP = (Proj * View * World); mat4 WV = (View * World); mat4 W = World; mat4 V = View; mat4 P = Proj;gl_Position = WVP * vec4(gl_Vertex.x, gl_Vertex.y, gl_Vertex.z, 1.0);gl_TexCoord[0] = gl_MultiTexCoord0; lightDataType light; light.position = vec4(0, 5, 0, 1); //Not sure what goes here vec3 mvNormal = vec3(WV * vec4(gl_Normal, 1.0)); //If its 0 at the end it produces incorrect results vec3 mvTangent = vec3(WV * vec4(tangent, 1.0)); vec3 mvBinormal = vec3(WV * vec4(bitangent, 1.0)); vec3 mvVertex = vec3(WV * gl_Vertex); //vec3 mvDirToEye = mEye - mvVertex; vec3 mvDirToEye = -mvVertex; vec3 tbnDirToEye; tbnDirToEye.x = dot(mvDirToEye, mvTangent); tbnDirToEye.y = dot(mvDirToEye, mvBinormal); tbnDirToEye.z = dot(mvDirToEye, mvNormal); vec3 mvDirToLight = vec3(light.position) - mvVertex; tbnDirToLight.x = dot(mvDirToLight, mvTangent); tbnDirToLight.y = dot(mvDirToLight, mvBinormal); tbnDirToLight.z = dot(mvDirToLight, mvNormal); tbnHalfVector = normalize(tbnDirToEye + tbnDirToLight);}Frag:
uniform sampler2D texUnit0; //Diffuseuniform sampler2D texUnit1; //Normaluniform sampler2D texUnit2; //Opacity, not used hereuniform sampler2D texUnit3; //Specularstruct lightDataType{ vec4 ambient; vec4 diffuse; vec4 specular; vec4 position;};varying vec3 tbnDirToLight;varying vec3 tbnHalfVector;void main(void){ lightDataType light; light.ambient = vec4(0.4, 0.4, 0.4, 1.0); light.diffuse = vec4(0.4, 0.4, 0.4, 1.0); light.specular = vec4(0.45, 0.45, 0.45, 1.0); float shininess = 100.0; vec4 baseColour = texture2D(texUnit0, gl_TexCoord[0].xy); vec3 normal = normalize(texture2D(texUnit1, gl_TexCoord[0].xy).xyz * 2.0 - 1.0); //normal.y = -normal.y; //UNCOMMENT IF WRONG vec4 ambient = light.ambient * baseColour; vec3 tbnNormDirToLight = normalize(tbnDirToLight); float diffuseIntensity = max(dot(tbnNormDirToLight, normal), 0.0); vec4 diffuse = light.diffuse * baseColour * diffuseIntensity; vec4 specular = vec4(0.0, 0.0, 0.0, 0.0); if(diffuseIntensity > 0.0) { vec4 specularColour = texture2D(texUnit3, gl_TexCoord[0].xy); float specularModifier = max(dot(normal, normalize(tbnHalfVector)), 0.0); specular = light.specular * specularColour * pow(specularModifier, shininess); } gl_FragColor = clamp(ambient + diffuse + specular, 0.0, 1.0); gl_FragColor.a = baseColour.a;}Im pretty sure its some mistake to do with opengl spaces, pls help.
