private void GlControlOnRender(object?sender, GlControlEventArgs e)
{
var senderControl = sender as GlControl;
int vpx = 0;
int vpy = 0;
int vpw = senderControl?.ClientSize.Width ?? 1;
int vph = senderControl?.ClientSize.Height ?? 1;
Gl.Viewport(vpx, vpy, vpw, vph);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
var projectionMatrix = _openGLCamera.ProjectionMatrix(vpw, vph);
var viewMatrix = _openGLCamera.ViewMatrix;
Gl.UseProgram(_program);
var u = Uniforms.Get(_program);
foreach (var meshEntry in _meshes.Where(m => m.Enabled))
{
var modelMatrix = meshEntry.GLMesh.ModelMatrix;
Gl.UniformMatrix4f(u.M, 1, true, modelMatrix);
Gl.UniformMatrix4f(u.P, 1, true, projectionMatrix);
Gl.UniformMatrix4f(u.V, 1, true, viewMatrix);
Gl.Uniform3f(u.LightPosition, 1, CameraLight?.Position ?? new Vector3(-50, 200, 50));
Gl.Uniform1f(u.LightPower, 1, _settingsViewModel.LightStrength);
Gl.Uniform1f(u.LightPower, 1, _settingsViewModel.LightStrength);
Gl.Uniform1f(u.Ambient, 1, _settingsViewModel.Ambient);
Gl.Uniform1f(u.SpecularStrength, 1, _settingsViewModel.SpecularMapStrength);
meshEntry.GLMesh.Render(u);
}
}
public void Render(Uniforms u)
{
Gl.EnableVertexAttribArray(0);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _buffers.VertexBuffer);
Gl.VertexAttribPointer(0, 3, VertexAttribType.Float, false, 0, IntPtr.Zero);
Gl.EnableVertexAttribArray(1);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _buffers.UvBuffer);
Gl.VertexAttribPointer(1, 2, VertexAttribType.Float, false, 0, IntPtr.Zero);
Gl.EnableVertexAttribArray(2);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _buffers.NormalBuffer);
Gl.VertexAttribPointer(2, 3, VertexAttribType.Float, false, 0, IntPtr.Zero);
Gl.EnableVertexAttribArray(3);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _buffers.TangentBuffer);
Gl.VertexAttribPointer(3, 3, VertexAttribType.Float, false, 0, IntPtr.Zero);
Gl.EnableVertexAttribArray(4);
Gl.BindBuffer(BufferTarget.ArrayBuffer, _buffers.BiTangentBuffer);
Gl.VertexAttribPointer(4, 3, VertexAttribType.Float, false, 0, IntPtr.Zero);
Gl.BindBuffer(BufferTarget.ElementArrayBuffer, _buffers.IndexBuffer);
void BindTexture(int textureId, TextureUnit unit, Texture?texture, int slot)
{
if (texture != null)
{
Gl.ActiveTexture(unit);
Gl.BindTexture(TextureTarget.Texture2d, texture.Buffer);
Gl.Uniform1i(textureId, 1, slot);
}
}
BindTexture(u.DiffuseSampler, TextureUnit.Texture0, DiffuseTexture, 0);
BindTexture(u.NormalSampler, TextureUnit.Texture1, NormalMap, 1);
BindTexture(u.SpecularSampler, TextureUnit.Texture2, SpecularMap, 2);
Gl.DrawElements(PrimitiveType.Triangles, _indexCount, DrawElementsType.UnsignedInt, IntPtr.Zero);
Gl.DisableVertexAttribArray(0);
}
