/// <summary>
/// Gets shader's source code for color coded picking.
/// </summary>
/// <param name="shaderType"></param>
/// <returns></returns>
public static string GetShaderSource(ShaderTypes shaderType)
{
string result = string.Empty;
switch (shaderType)
{
case ShaderTypes.VertexShader:
if (vertexShader == null)
{
vertexShader = ManifestResourceLoader.LoadTextFile(@"ColorCodedPicking\PickingShader.vert");
}
result = vertexShader;
break;
case ShaderTypes.FragmentShader:
if (fragmentShader == null)
{
fragmentShader = ManifestResourceLoader.LoadTextFile(@"ColorCodedPicking\PickingShader.frag");
}
result = fragmentShader;
break;
default:
throw new NotImplementedException();
}
return(result);
}
/// <summary>
/// Initialises the scene.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
/// <param name="width">The width of the screen.</param>
/// <param name="height">The height of the screen.</param>
public void Initialise(OpenGL gl)
{
// Set a blue clear colour.
gl.ClearColor(0.4f, 0.6f, 0.9f, 0.5f);
{
// Create the shader program.
var vertexShaderSource = ManifestResourceLoader.LoadTextFile(@"Model\Shader.vert");
var fragmentShaderSource = ManifestResourceLoader.LoadTextFile(@"Model\Shader.frag");
var shaderProgram = new ShaderProgram();
shaderProgram.Create(gl, vertexShaderSource, fragmentShaderSource, null);
shaderProgram.BindAttributeLocation(gl, attributeIndexPosition, "in_Position");
shaderProgram.BindAttributeLocation(gl, attributeIndexColour, "in_Color");
shaderProgram.AssertValid(gl);
this.shaderProgram = shaderProgram;
}
{
// Create the picking shader program.
var vertexShaderSource = ColorCodedPickingShaderHelper.GetShaderSource(ColorCodedPickingShaderHelper.ShaderTypes.VertexShader);
var fragmentShaderSource = ColorCodedPickingShaderHelper.GetShaderSource(ColorCodedPickingShaderHelper.ShaderTypes.FragmentShader);
var shaderProgram = new ShaderProgram();
shaderProgram.Create(gl, vertexShaderSource, fragmentShaderSource, null);
shaderProgram.BindAttributeLocation(gl, attributeIndexPosition, "in_Position");
shaderProgram.BindAttributeLocation(gl, attributeIndexColour, "in_Color");
shaderProgram.AssertValid(gl);
this.pickingShaderProgram = shaderProgram;
}
unsafe
{
// Create the vertex array object.
vertexBufferArray = new VertexBufferArray();
vertexBufferArray.Create(gl);
vertexBufferArray.Bind(gl);
// Create a vertex buffer for the vertex data.
var vertexDataBuffer = new VertexBuffer();
vertexDataBuffer.Create(gl);
vertexDataBuffer.Bind(gl);
//vertexDataBuffer.SetData(gl, 0,
//this.Model.VertexCount * sizeof(Vertex), (IntPtr)this.Model.Positions, false, 3, OpenGL.GL_FLOAT);
vertexDataBuffer.SetData(gl, 0, this.Model.Positions, false, 3);
// Now do the same for the colour data.
var colourDataBuffer = new VertexBuffer();
colourDataBuffer.Create(gl);
colourDataBuffer.Bind(gl);
//colourDataBuffer.SetData(gl, 1,
//this.Model.VertexCount * sizeof(ByteColor), (IntPtr)this.Model.Colors, false, 3, OpenGL.GL_BYTE);
colourDataBuffer.SetData(gl, 1, this.Model.Colors, false, 3);
// Unbind the vertex array, we've finished specifying data for it.
vertexBufferArray.Unbind(gl);
}
//// Create a perspective projection matrix.
//const float rads = (60.0f / 360.0f) * (float)Math.PI * 2.0f;
//projectionMatrix = glm.perspective(rads, width / height, 0.1f, 100.0f);
//// Create a view matrix to move us back a bit.
//viewMatrix = glm.translate(new mat4(1.0f), new vec3(0.0f, 0.0f, -5.0f));
//// Create a model matrix to make the model a little bigger.
//modelMatrix = glm.scale(new mat4(1.0f), new vec3(2.5f));
////IPerspectiveCamera camera = this.cameraRotation.Camera;
////projectionMatrix = camera.GetProjectionMat4();
////viewMatrix = this.cameraRotation.Camera.GetViewMat4();
////modelMatrix = mat4.identity();
//// Now create the geometry for the square.
//CreateVertices(gl);
this.initialised = true;
}
