private static List<ShaderSnippet> AssembleFragmentSnippets(ShaderSnippet sceneFragmentShader,
List<OptionalDataBuffer> buffers, List<Light> lights)
{
List<ShaderSnippet> fragmentSnippets = new List<ShaderSnippet>();
//fragmentSnippets.reserve(1 + buffers.Count + lights.size());
fragmentSnippets.Add(sceneFragmentShader);
foreach (var buffer in buffers)
fragmentSnippets.Add(buffer.GetFragmentShaderGLSL());
if (lights.Count > 0) //only need one instance of light code
fragmentSnippets.Add(lights[0].GetFragmentShaderGLSL());
return fragmentSnippets;
}
public static ShaderProgram CreateProgram(InstancedModel model,
ShaderSnippet sceneVertexShader, ShaderSnippet sceneFragmentShader, List<Light> lights)
{
Console.Write("Creating vertex and fragment shaders for Model with {0} light(s)... ", lights.Count);
var buffers = model.GetOptionalDataBuffers();
var vertexShaderStr = AssembleVertexShaderStr(buffers, sceneVertexShader, lights);
var fragmentShaderStr = AssembleFragmentShaderStr(buffers, sceneFragmentShader, lights);
Console.WriteLine("done.");
return ShaderProgram.MakeProgram(
Shader.MakeVertexShaderStr(vertexShaderStr),
Shader.MakeFragmentShaderStr(fragmentShaderStr)
);
}
private static string AssembleFragmentShaderStr(List<OptionalDataBuffer> buffers,
ShaderSnippet sceneFragmentShader, List<Light> lights)
{
var fragmentSnippets = AssembleFragmentSnippets(sceneFragmentShader, buffers, lights);
return BuildShader(
AssembleFields(fragmentSnippets),
AssembleMethods(fragmentSnippets),
AssembleMainBodyCode(fragmentSnippets) + @"
//final fragment shader main body code from ShaderManager
if (colors.material == vec3(-1))
colors.material = vec3(1);
if (colors.lightBlend == vec3(-1))
colors.lightBlend = vec3(1);
vec3 lighting = ambientLight * colors.lightBlend;
vec3 color = colors.material * lighting;
gl_FragColor = vec4(color, 1);
"
);
}
private static string AssembleVertexShaderStr(List<OptionalDataBuffer> buffers,
ShaderSnippet sceneVertexShader, List<Light> lights)
{
var vertexSnippets = AssembleVertexSnippets(sceneVertexShader, buffers, lights);
return BuildShader(
AssembleFields(vertexSnippets),
AssembleMethods(vertexSnippets),
AssembleMainBodyCode(vertexSnippets)
);
}