/// <summary>
/// Draw the scene
/// </summary>
/// <param name="camera">The camera where you want to draw from</param>
/// <param name="window">The window you want to draw to</param>
public void Draw(Camera camera, GameWindow window)
{
Matrix4 mat = camera.CalculateMatrix();
_voxelData.Update();
_modelData.Update();
for (int i = 0; i < _models.Count; i++)
{
Matrix4 inverseModelMatrix = _models[i].Transform.CalculateInverseMatrix();
Matrix4 modelMatrix = _models[i].Transform.CalculateMatrix();
Matrix4 normalMatrix = _models[i].Transform.CalculateNormalMatrix();
// Check if the matrices are the same to avoid sending data the gpu already has
if (_modelTransformations[i * 3 + 0] != inverseModelMatrix)
{
_modelTransformations[i * 3 + 0] = inverseModelMatrix;
}
if (_modelTransformations[i * 3 + 1] != modelMatrix)
{
_modelTransformations[i * 3 + 1] = modelMatrix;
}
if (_modelTransformations[i * 3 + 2] != normalMatrix)
{
_modelTransformations[i * 3 + 2] = normalMatrix;
}
}
_modelTransformations.Update();
Shader.Bind();
GL.BindVertexArray(_canvasFB.Vao);
// Send the buffers containing the models
_voxelData.Bind(TextureUnit.Texture0);
GL.Uniform1(Shader.GetUniformLocation("u_voxelBuffer"), 1, new[] { 0 });
_modelData.Bind(TextureUnit.Texture1);
GL.Uniform1(Shader.GetUniformLocation("u_modelData"), 1, new[] { 1 });
_modelTransformations.Bind(TextureUnit.Texture2);
GL.Uniform1(Shader.GetUniformLocation("u_modelTransformations"), 1, new[] { 2 });
// Send the materials
Materials.Bind("u_materials");
// Send the windowsize
GL.Uniform2(Shader.GetUniformLocation("u_windowSize"), 1, new float[] { window.Width, window.Height / 2 });
// Send the camera
GL.Uniform1(Shader.GetUniformLocation("u_camera.zoom"), 1, new[] { (window.Height / 1.5f) / (float)Math.Tan(camera.Fov * (Math.PI / 360.0f)) });
GL.UniformMatrix4(Shader.GetUniformLocation("u_camera.matrix"), false, ref mat);
// Send the lights
GL.Uniform1(Shader.GetUniformLocation("u_dirLightCount"), DirectionalLights.Count());
for (int i = 0; i < DirectionalLights.Count(); i++)
{
GL.Uniform3(Shader.GetUniformLocation($"u_dirLights[{i}].direction"), DirectionalLights[i].direction);
GL.Uniform1(Shader.GetUniformLocation($"u_dirLights[{i}].intensity"), DirectionalLights[i].intensity);
GL.Uniform3(Shader.GetUniformLocation($"u_dirLights[{i}].colour"), DirectionalLights[i].colour);
}
GL.Uniform1(Shader.GetUniformLocation("u_pointLightCount"), PointLights.Count());
for (int i = 0; i < PointLights.Count(); i++)
{
GL.Uniform3(Shader.GetUniformLocation($"u_pointLights[{i}].position"), PointLights[i].position); //_pointLights[i].position
GL.Uniform1(Shader.GetUniformLocation($"u_pointLights[{i}].intensity"), PointLights[i].intensity);
GL.Uniform3(Shader.GetUniformLocation($"u_pointLights[{i}].colour"), PointLights[i].colour);
}
GL.BindFramebuffer(FramebufferTarget.Framebuffer, _framebuffer);
//GL.Viewport(window.Width / 2, window.Height / 2, window.Width / 2, window.Height / 2);
GL.DrawArrays(PrimitiveType.TriangleFan, 0, 4);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
Shader.Unbind();
ScaleShader.Bind();
GL.BindVertexArray(_canvas.Vao);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, _textureColorBuffer);
GL.Uniform1(ScaleShader.GetUniformLocation("u_framebuffer"), 1, new[] { 0 });
GL.Uniform2(ScaleShader.GetUniformLocation("u_resolution"), 1, new float[] { window.Width, window.Height });
//GL.Viewport(0,0, window.Width,window.Height);
GL.DrawArrays(PrimitiveType.TriangleFan, 0, 4);
ScaleShader.Unbind();
}