public BasicShadedColoredMaterial()
{
var vertexShader = new GlShader(ShaderType.VertexShader);
vertexShader.LoadSource(VertexShaderSource);
var fragmentShader = new GlShader(ShaderType.FragmentShader);
fragmentShader.LoadSource(FragmentShaderSource);
Bind();
LoadShader(vertexShader);
LoadShader(fragmentShader);
Link();
PositionBuffer = new GlBuffer(BufferTarget.ArrayBuffer);
PositionBuffer.Bind();
NormalBuffer = new GlBuffer(BufferTarget.ArrayBuffer);
NormalBuffer.Bind();
ColorBuffer = new GlBuffer(BufferTarget.ArrayBuffer);
ColorBuffer.Bind();
MatrixBuffer = new GlBuffer(BufferTarget.ArrayBuffer);
MatrixBuffer.Bind();
var positionBufferLayout = new GlBufferLayout();
positionBufferLayout.Add(VertexAttribPointerType.Float, 3); //Vector3 3 floats
var normalBufferLayout = new GlBufferLayout();
normalBufferLayout.Add(VertexAttribPointerType.Float, 3);
var colorBufferLayout = new GlBufferLayout();
colorBufferLayout.Add(VertexAttribPointerType.Float, 4);
var matrixBufferLayout = new GlBufferLayout();
matrixBufferLayout.Add(VertexAttribPointerType.Float, 4, divisor: 1); //Matrix 16 floats
matrixBufferLayout.Add(VertexAttribPointerType.Float, 4, divisor: 1);
matrixBufferLayout.Add(VertexAttribPointerType.Float, 4, divisor: 1);
matrixBufferLayout.Add(VertexAttribPointerType.Float, 4, divisor: 1);
VertexArray = new GlVertexArray();
VertexArray.AddBuffer(PositionBuffer, positionBufferLayout);
VertexArray.AddBuffer(NormalBuffer, normalBufferLayout);
VertexArray.AddBuffer(ColorBuffer, colorBufferLayout);
VertexArray.AddBuffer(MatrixBuffer, matrixBufferLayout);
}
public GlShaderProgram(string[] vertex_shader_source, string[] fragment_shader_source)
{
using (GlShader vertex_shader = new GlShader(ShaderType.VertexShader, vertex_shader_source))
using (GlShader fragment_shader = new GlShader(ShaderType.FragmentShader, fragment_shader_source))
{
ProgramId = Gl.CreateProgram();
Gl.AttachShader(ProgramId, vertex_shader.ShaderId);
Gl.AttachShader(ProgramId, fragment_shader.ShaderId);
Gl.LinkProgram(ProgramId);
Gl.GetProgram(ProgramId, ProgramProperty.LinkStatus, out int link_succeeded);
if (link_succeeded == 0)
{
StringBuilder log = new StringBuilder(MaxErrorLength);
Gl.GetProgramInfoLog(ProgramId, MaxErrorLength, out int log_length, log);
throw new InvalidOperationException($"Failed to link program : {log}");
}
}
}
