private void RenderNode(DeviceContext deviceContext, Node? node, Frustum frustum, HeightMapTerrainShader shader)
{
if (node == null)
return;
var theNode = node.Value;
// Check to see if the node can be viewed, height doesn't matter in a quad tree.
// If it can't be seen then none of its children can either, so don't continue down the tree, this is where the speed is gained.
if (!frustum.CheckCube(theNode.PositionX, 0, theNode.PositionZ, theNode.Width / 2))
return;
// If it can be seen then check all four child nodes to if they can also be seen
var count = 0;
for (int i = 0; i < 4; i++)
{
if (theNode.Nodes[i] != null)
{
count++;
RenderNode(deviceContext, theNode.Nodes[i], frustum, shader);
}
}
// If there were any children nodes then there is no need to continue as parent nodes won't contain any triangles to render.
if (count != 0)
return;
// Otherwise if this node can be seen and has triangles in it then render these triangles.
// Set the vertex buffer to active in the input assembler so it can be rendered.
deviceContext.InputAssembler.SetVertexBuffers(0, new VertexBufferBinding(theNode.VertexBuffer, Utilities.SizeOf<HeightMapTerrainShader.Vertex>(), 0));
// Set the index buffer to active in the input assembler so it can be rendered.
deviceContext.InputAssembler.SetIndexBuffer(theNode.IndexBuffer, Format.R32_UInt, 0);
// Set the type of the primitive that should be rendered from this vertex buffer, in this case triangles.
deviceContext.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList;
// Determine the number of the indices in this node.
var indexCount = theNode.TriangleCount * 3;
// Call the terrain shader to render the polygons in this node.
shader.RenderShader(deviceContext, indexCount);
// Increase the count of the number of polygons that have been rendered during this frame.
DrawCount += theNode.TriangleCount;
}
public bool Initialize(SystemConfiguration configuration, IntPtr windowHandle)
{
try
{
// Create the Direct3D object.
D3D = new DX11();
// Initialize the Direct3D object.
if (!D3D.Initialize(configuration, windowHandle))
{
MessageBox.Show("Could not initialize Direct3D", "Error", MessageBoxButtons.OK);
return false;
}
// Create the camera object
Camera = new Camera();
// Initialize a base view matrix the camera for 2D user interface rendering.
Camera.SetPosition(0, 0, -1);
Camera.Render();
var baseViewMatrix = Camera.ViewMatrix;
// Create the text object.
Text = new Text();
if (!Text.Initialize(D3D.Device, D3D.DeviceContext, windowHandle, configuration.Width, configuration.Height, baseViewMatrix))
{
MessageBox.Show("Could not initialize the text object", "Error", MessageBoxButtons.OK);
return false;
}
// Create the model class.
Model = new Model();
// Initialize the model object.
if (!Model.Initialize(D3D.Device, "sphere.txt", "seafloor.dds"))
{
MessageBox.Show("Could not initialize the model object", "Error", MessageBoxButtons.OK);
return false;
}
// Create the light shader object.
LightShader = new LightShader();
// Initialize the light shader object.
if (!LightShader.Initialize(D3D.Device, windowHandle))
{
MessageBox.Show("Could not initialize the light shader", "Error", MessageBoxButtons.OK);
return false;
}
// Create the light object.
Light = new Light();
// Initialize the light object.
Light.SetAmbientColor(0.15f, 0.15f, 0.15f, 1.0f);
Light.SetDiffuseColor(1, 0, 0, 1f);
Light.SetDirection(1, 0, 1);
Light.SetSpecularColor(0, 1, 1, 1);
Light.SetSpecularPower(32);
// Create the model list object.
ModelList = new ModelList();
// Initialize the model list object.
if (!ModelList.Initialize(25))
{
MessageBox.Show("Could not initialize the model list object", "Error", MessageBoxButtons.OK);
return false;
}
// Create the frustum object.
Frustum = new Frustum();
return true;
}
catch (Exception ex)
{
MessageBox.Show("Could not initialize Direct3D\nError is '" + ex.Message + "'");
return false;
}
}
public void Render(DeviceContext deviceContext, Frustum frustum, HeightMapTerrainShader shader)
{
// Reset the number of the triangles that are drawn for this frame.
DrawCount = 0;
// Render each node that is visible at the parent node and moving down the tree.
RenderNode(deviceContext, ParentNode, frustum, shader);
}
public bool Initialize(SystemConfiguration configuration, IntPtr windowHandle)
{
if (Input == null)
{
Input = new InputClass();
if (!Input.Initialize(configuration, windowHandle))
{
MessageBox.Show("Could not initialize input object", "Error", MessageBoxButtons.OK);
return false;
}
}
// Create the Direct3D object.
D3D = new DX11();
// Initialize the Direct3D object.
if (!D3D.Initialize(configuration, windowHandle))
{
MessageBox.Show("Could not initialize Direct3D", "Error", MessageBoxButtons.OK);
return false;
}
// Create the camera object
Camera = new Camera();
// Initialize a base view matrix the camera for 2D user interface rendering.
Camera.SetPosition(0, 0, -1);
Camera.Render();
var baseViewMatrix = Camera.ViewMatrix;
// Set the initial position of the camera.
var cameraX = 50f;
var cameraY = 18f;
var cameraZ = -7f;
Camera.SetPosition(cameraX, cameraY, cameraZ);
// Create the terrain object.
Terrain = new HeightMapTerrain();
// Initialize the terrain object.
if (!(Terrain as HeightMapTerrain).Initialize(D3D.Device, "heightMap01.bmp", "dirt02.dds"))
{
MessageBox.Show("Could not initialize the terrain object", "Error", MessageBoxButtons.OK);
return false;
}
// Create and initialize Timer.
Timer = new Timer();
if (!Timer.Initialize())
{
MessageBox.Show("Could not initialize Timer object", "Error", MessageBoxButtons.OK);
return false;
}
// Create the position object.
Position = new Position();
// Set the initial position of the viewer to the same as the initial camera position.
Position.SetPosition(new Vector3(cameraX, cameraY, cameraZ));
// Create and initialize the FPS object.
FPS = new FPS();
FPS.Initialize();
// Create and initialize the CPU.
CPU = new CPU();
CPU.Initialize();
// Create the font shader object.
FontShader = new FontShader();
// Initialize the font shader object.
if (!FontShader.Initialize(D3D.Device, windowHandle))
{
MessageBox.Show("Could not initialize font shader object", "Error", MessageBoxButtons.OK);
return false;
}
// Create the text object.
Text = new Text();
if (!Text.Initialize(D3D.Device, D3D.DeviceContext, windowHandle, configuration.Width, configuration.Height, baseViewMatrix))
{
MessageBox.Show("Could not initialize the text object", "Error", MessageBoxButtons.OK);
return false;
}
// Set the video card information in the text object.
if (!Text.SetVideoCard(D3D.VideoCardDescription, D3D.VideoCardMemory, D3D.DeviceContext))
{
MessageBox.Show("Could not set video card into the text object", "Error", MessageBoxButtons.OK);
return false;
}
// Create the height map terrain shader object.
HeightMapTerrainShader = new HeightMapTerrainShader();
// Initialize the height map terrain shader object.
if (!HeightMapTerrainShader.Initialize(D3D.Device, windowHandle))
{
MessageBox.Show("Could not initialize the height map terrain shader", "Error", MessageBoxButtons.OK);
return false;
}
// Create the light object.
Light = new Light();
// Initialize the light object
Light.SetAmbientColor(0.5f, 0.5f, 0.5f, 1f);
Light.SetDiffuseColor(1f, 1f, 1f, 1f);
Light.SetDirection(0f, 0f, 0.75f);
// Create the frustum object.
Frustum = new Frustum();
// Create the quad tree object.
QuadTree = new QuadTree();
// Initialize the quad tree object.
if (!QuadTree.Initialize(D3D.Device, Terrain))
{
MessageBox.Show("Could not initialize the quad tree object", "Error", MessageBoxButtons.OK);
return false;
}
return true;
}
