private WebGLProgram InitProgram(WebGLContext gl, string vsSource, string fsSource)
{
var vertexShader = this.LoadShader(gl, ShaderType.VERTEX_SHADER, vsSource);
var fragmentShader = this.LoadShader(gl, ShaderType.FRAGMENT_SHADER, fsSource);
var program = gl.CreateProgram();
gl.AttachShader(program, vertexShader);
gl.AttachShader(program, fragmentShader);
gl.LinkProgram(program);
gl.DeleteShader(vertexShader);
gl.DeleteShader(fragmentShader);
if (!gl.GetProgramParameter <bool>(program, ProgramParameter.LINK_STATUS))
{
string info = gl.GetProgramInfoLog(program);
throw new Exception("An error occured while linking the program: " + info);
}
return(program);
}
private static void initShaders()
{
var fragmentShader = GetShader(gl, "shader-fs");
var vertexShader = GetShader(gl, "shader-vs");
shaderProgram = gl.CreateProgram();
gl.AttachShader(shaderProgram, vertexShader);
gl.AttachShader(shaderProgram, fragmentShader);
gl.LinkProgram(shaderProgram);
if (!gl.GetProgramParameter(shaderProgram, gl.LinkStatus))
{
throw new Exception("Could not initialize shaders");
}
gl.UseProgram(shaderProgram);
vertexPositionAttribute = gl.GetAttributeLocation(shaderProgram, "aVertexPosition");
gl.EnableVertexAttributeArray(vertexPositionAttribute);
pMatrixUniform = gl.GetUniformLocation(shaderProgram, "uPMatrix");
mvMatrixUniform = gl.GetUniformLocation(shaderProgram, "uMVMatrix");
}