DirectX Samples

Added by dholton dholton

DirectX Samples in Boo

These are examples that use the Managed DirectX API for .NET.

They require the DirectX SDK from Microsoft. And of course these run on Windows only. For a cross-platform alternative for 3D graphics, see OpenGL 3D samples.

Textures Example

This is the code from tutorial 5 included with the DirectX SDK, converted to boo (mostly converted automatically by the boo sharpdevelop addin).

namespace BooDirect3D.Sample.Textures

import System
import System.Drawing from System.Drawing
import System.Windows.Forms from System.Windows.Forms
import Microsoft.DirectX from Microsoft.DirectX
import Microsoft.DirectX.Direct3D from Microsoft.DirectX.Direct3D
import Microsoft.DirectX.Direct3D from Microsoft.DirectX.Direct3DX
import System.IO

class MyWindow(Form):
	_device as Device = null
	
	_vertexBuffer as VertexBuffer = null
	
	_texture as Texture = null
	
	_presentParams = PresentParameters()
	
	_pause = false
	
	def constructor():
		self.ClientSize = System.Drawing.Size(400, 300)
		self.Text = 'Direct3D Tutorial 5 - Textures'
	
	def InitializeGraphics() as bool:
		try:
			_presentParams.Windowed = true
			_presentParams.SwapEffect = SwapEffect.Discard
			_presentParams.EnableAutoDepthStencil = true
			_presentParams.AutoDepthStencilFormat = DepthFormat.D16
			_device = Device(0, DeviceType.Hardware, 
				self, 
				CreateFlags.SoftwareVertexProcessing,
				_presentParams)
				//or if you have an old boo version, use this instead:
				//(_presentParams,))
				
			_device.DeviceReset += OnResetDevice
			self.OnCreateDevice(_device, null)
			self.OnResetDevice(_device, null)
			_pause = false
			return true
		except ex as DirectXException:
			MessageBox.Show(ex.ToString())
			return false
		
	
	def OnCreateDevice(sender, e as EventArgs):
		dev as Device = sender
		_vertexBuffer = VertexBuffer(
			CustomVertex.PositionNormalTextured, 
			100, dev, Usage.WriteOnly, 
			CustomVertex.PositionNormalTextured.Format, 
			Pool.Default)
		_vertexBuffer.Created += OnCreateVertexBuffer
		self.OnCreateVertexBuffer(_vertexBuffer, null)
	
	def OnResetDevice(sender, e as EventArgs):
		dev as Device = sender
		dev.RenderState.CullMode = Cull.None
		dev.RenderState.Lighting = false
		dev.RenderState.ZBufferEnable = true
		if not File.Exists("banana.bmp"):
			MessageBox.Show("Can't find banana.bmp file.")
			Environment.Exit(-1)
		_texture = TextureLoader.FromFile(dev, "banana.bmp")
	
	def OnCreateVertexBuffer(sender, e as EventArgs):
		vb as VertexBuffer = sender
		verts as (CustomVertex.PositionNormalTextured) = vb.Lock(0, LockFlags.None)
		i as int = 0
		while i < 50:
			rawArrayIndexing:
				theta as single = (2 * Math.PI * i) / 49.0
				verts[2 * i].Position = Vector3(Math.Sin(theta), -1, Math.Cos(theta))
				verts[2 * i].Normal = Vector3(Math.Sin(theta), 0, Math.Cos(theta))
				verts[2 * i].Tu = i / 49.0
				verts[2 * i].Tv = 1
				verts[2 * i + 1].Position = Vector3(Math.Sin(theta), 1, Math.Cos(theta))
				verts[2 * i + 1].Normal = Vector3(Math.Sin(theta), 0, Math.Cos(theta))
				verts[2 * i + 1].Tu = i / 49.0
				verts[2 * i + 1].Tv = 0
			++i
		
		vb.Unlock()
	
	private def SetupMatrices():
		_device.Transform.World = Matrix.RotationAxis(
			Vector3(Math.Cos(Environment.TickCount / 250.0), 
			1, Math.Sin(Environment.TickCount / 250.0)),
			Environment.TickCount / 1000.0)
		_device.Transform.View = Matrix.LookAtLH(
			Vector3(0, 3, -5), 
			Vector3(0, 0, 0), 
			Vector3(0, 1, 0))
		_device.Transform.Projection = Matrix.PerspectiveFovLH(
			Math.PI / 4.0, 1, 1, 100)
	
	def Render(): //main drawing loop
		if _pause:
			return
		
		_device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, 
				System.Drawing.Color.Blue, 1, 0)
		_device.BeginScene()
		SetupMatrices()
		rawArrayIndexing:
			_device.SetTexture(0, _texture)
			_device.TextureState[0].ColorOperation = TextureOperation.Modulate
			_device.TextureState[0].ColorArgument1 = TextureArgument.TextureColor
			_device.TextureState[0].ColorArgument2 = TextureArgument.Diffuse
			_device.TextureState[0].AlphaOperation = TextureOperation.Disable
			_device.SetStreamSource(0, _vertexBuffer, 0)
			_device.VertexFormat = CustomVertex.PositionNormalTextured.Format
			_device.DrawPrimitives(PrimitiveType.TriangleStrip, 0, (4 * 25) - 2)
			_device.EndScene()
			_device.Present()
	
	protected override def OnPaint(e as PaintEventArgs):
		self.Render()
	
	protected override def OnKeyPress(e as KeyPressEventArgs):
		if cast(int,e.KeyChar) == cast(int,Keys.Escape):
			self.Dispose()
		//(if you subscribe to keypress event instead, check e.KeyCode==Keys.Escape

	protected override def OnResize(e as System.EventArgs):
		_pause = ((self.WindowState == FormWindowState.Minimized) or not self.Visible)


//main section:

using frm = MyWindow():
	if not frm.InitializeGraphics():
		MessageBox.Show('Could not initialize Direct3D.  This tutorial will exit.')
		return
	
	frm.Show()
	while frm.Created:
		frm.Render()
		Application.DoEvents()