private static void RenderInstance(ModelInstance inst)
{
ModelAsset asset = inst.Asset;
Program shaders = asset.Shaders;
// bind the shaders
shaders.Use();
// set the shader uniforms
Matrix m = _gCamera.CombinedMatrix;
shaders.SetUniform("camera", ref m);
shaders.SetUniform("model", ref inst.Transform);
shaders.SetUniform("tex", 0); // set to 0 because the texture will be bound to GL_TEXTURE0
shaders.SetUniform("light.position", _gLight.Position);
shaders.SetUniform("light.intensities", _gLight.Intensities);
//bind the texture
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, asset.Texture.GLObject);
// bind VAO and draw
GL.BindVertexArray(asset.Vao);
GL.DrawArrays(asset.DrawType, asset.DrawStart, asset.DrawCount);
// unbind everything
GL.BindVertexArray(0);
GL.BindTexture(TextureTarget.Texture2D, 0);
shaders.StopUsing();
}
// initialises the _gWoodenCrate global
private static void LoadWoodenCrateAsset()
{
// set all the elements of gWoodenCrate
_gWoodenCrate = new ModelAsset();
_gWoodenCrate.Shaders = LoadShaders("vertex-shader.glsl", "fragment-shader.glsl");
_gWoodenCrate.DrawType = BeginMode.Triangles;
_gWoodenCrate.DrawStart = 0;
_gWoodenCrate.DrawCount = 6 * 2 * 3;
_gWoodenCrate.Texture = LoadTexture("wooden-crate.png");
_gWoodenCrate.Shininess = 80.0f;
_gWoodenCrate.SpecularColor = new Vector3(1.0f, 1.0f, 1.0f);
GL.GenBuffers(1, out _gWoodenCrate.Vbo);
GL.GenVertexArrays(1, out _gWoodenCrate.Vao);
// bind the VAO
GL.BindVertexArray(_gWoodenCrate.Vao);
// bind the VBO
GL.BindBuffer(BufferTarget.ArrayBuffer, _gWoodenCrate.Vbo);
// Make a cube out of triangles (two triangles per side)
float[] vertexData = new float[] {
// X Y Z U V Normal
// bottom
-1.0f,-1.0f,-1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f,
1.0f,-1.0f,-1.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f,
-1.0f,-1.0f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
1.0f,-1.0f,-1.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f,
1.0f,-1.0f, 1.0f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f,
-1.0f,-1.0f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
// top
-1.0f, 1.0f,-1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f,-1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f,-1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
// front
-1.0f,-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f,-1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
1.0f,-1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
// back
-1.0f,-1.0f,-1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -1.0f,
-1.0f, 1.0f,-1.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f,
1.0f,-1.0f,-1.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f,
1.0f,-1.0f,-1.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f,
-1.0f, 1.0f,-1.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f,
1.0f, 1.0f,-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, -1.0f,
// left
-1.0f,-1.0f, 1.0f, 0.0f, 1.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f,-1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f,-1.0f,-1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f,-1.0f, 1.0f, 0.0f, 1.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f,-1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
// right
1.0f,-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
1.0f,-1.0f,-1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f,-1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f,-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f,-1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f
};
GL.BufferData<float>(BufferTarget.ArrayBuffer, new IntPtr(vertexData.Length * sizeof(float)), vertexData, BufferUsageHint.StaticDraw);
// connect the xyz to the "vert" attribute of the vertex shader
GL.EnableVertexAttribArray(_gWoodenCrate.Shaders.Attrib("vert"));
GL.VertexAttribPointer(_gWoodenCrate.Shaders.Attrib("vert"), 3, VertexAttribPointerType.Float, false, 8 * sizeof(float), 0);
// connect the uv coords to the "vertTexCoord" attribute of the vertex shader
GL.EnableVertexAttribArray(_gWoodenCrate.Shaders.Attrib("vertTexCoord"));
GL.VertexAttribPointer(_gWoodenCrate.Shaders.Attrib("vertTexCoord"), 2, VertexAttribPointerType.Float, true, 8 * sizeof(float), 3 * sizeof(float));
// connect the normal to the "vertNormal" attribute of the vertex shader
GL.EnableVertexAttribArray(_gWoodenCrate.Shaders.Attrib("vertNormal"));
GL.VertexAttribPointer(_gWoodenCrate.Shaders.Attrib("vertNormal"), 3, VertexAttribPointerType.Float, true, 8 * sizeof(float), 5 * sizeof(float));
// unbind the VAO
GL.BindVertexArray(0);
}
// initialises the _gWoodenCrate global
private static void LoadWoodenCrateAsset()
{
// set all the elements of gWoodenCrate
_gWoodenCrate = new ModelAsset();
_gWoodenCrate.Shaders = LoadShaders("vertex-shader.glsl", "fragment-shader.glsl");
_gWoodenCrate.DrawType = BeginMode.Triangles;
_gWoodenCrate.DrawStart = 0;
_gWoodenCrate.DrawCount = 6 * 2 * 3;
_gWoodenCrate.Texture = LoadTexture("wooden-crate.png");
GL.GenBuffers(1, out _gWoodenCrate.Vbo);
GL.GenVertexArrays(1, out _gWoodenCrate.Vao);
// bind the VAO
GL.BindVertexArray(_gWoodenCrate.Vao);
// bind the VBO
GL.BindBuffer(BufferTarget.ArrayBuffer, _gWoodenCrate.Vbo);
// Make a cube out of triangles (two triangles per side)
float[] vertexData = new float[] {
// X Y Z U V Normal
// bottom
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 0.0f, -1.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f, -1.0f, 0.0f,
// top
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
// front
-1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
// back
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f, -1.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, -1.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f,
1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, -1.0f,
// left
-1.0f, -1.0f, 1.0f, 0.0f, 1.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 1.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f,
// right
1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f
};
GL.BufferData <float>(BufferTarget.ArrayBuffer, new IntPtr(vertexData.Length * sizeof(float)), vertexData, BufferUsageHint.StaticDraw);
// connect the xyz to the "vert" attribute of the vertex shader
GL.EnableVertexAttribArray(_gWoodenCrate.Shaders.Attrib("vert"));
GL.VertexAttribPointer(_gWoodenCrate.Shaders.Attrib("vert"), 3, VertexAttribPointerType.Float, false, 8 * sizeof(float), 0);
// connect the uv coords to the "vertTexCoord" attribute of the vertex shader
GL.EnableVertexAttribArray(_gWoodenCrate.Shaders.Attrib("vertTexCoord"));
GL.VertexAttribPointer(_gWoodenCrate.Shaders.Attrib("vertTexCoord"), 2, VertexAttribPointerType.Float, true, 8 * sizeof(float), 3 * sizeof(float));
// connect the normal to the "vertNormal" attribute of the vertex shader
GL.EnableVertexAttribArray(_gWoodenCrate.Shaders.Attrib("vertNormal"));
GL.VertexAttribPointer(_gWoodenCrate.Shaders.Attrib("vertNormal"), 3, VertexAttribPointerType.Float, true, 8 * sizeof(float), 5 * sizeof(float));
// unbind the VAO
GL.BindVertexArray(0);
}
