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add SkyBox helper class

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Gered 2013-09-02 20:24:27 -04:00
parent 17807036d4
commit e70b7d8af5
2 changed files with 208 additions and 0 deletions
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1
Blarg.GameFramework/Blarg.GameFramework.csproj
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@ -226,6 +226,7 @@
<Compile Include="Entities\SystemComponents\EntityPresetComponent.cs" />
<Compile Include="Graphics\PerspectiveCamera.cs" />
<Compile Include="Graphics\EulerPerspectiveCamera.cs" />
<Compile Include="Graphics\Helpers\SkyBox.cs" />
</ItemGroup>
<Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
<ItemGroup>

207
Blarg.GameFramework/Graphics/Helpers/SkyBox.cs Normal file
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@ -0,0 +1,207 @@
using System;
namespace Blarg.GameFramework.Graphics.Helpers
{
public class SkyBox
{
Texture _top;
Texture _bottom;
Texture _left;
Texture _right;
Texture _front;
Texture _back;
VertexBuffer _vertices;
RenderState _renderState;
BlendState _blendState;
public SkyBox(Texture top,
Texture bottom,
Texture left,
Texture right,
Texture front,
Texture back)
{
if (top == null || bottom == null || left == null || right == null || front == null || back == null)
throw new ArgumentNullException();
_top = top;
_bottom = bottom;
_left = left;
_right = right;
_front = front;
_back = back;
SetupRenderSettings();
GenerateVertices();
}
public SkyBox(Texture top,
Texture side,
Texture bottom)
{
if (top == null || side == null || bottom == null)
throw new ArgumentNullException();
_top = top;
_bottom = bottom;
_left = side;
_right = side;
_front = side;
_back = side;
SetupRenderSettings();
GenerateVertices();
}
private void SetupRenderSettings()
{
_renderState = new RenderState();
_renderState.DepthTesting = false;
_renderState.DepthWriting = false;
_blendState = new BlendState();
}
private void GenerateVertices()
{
const float n = 10.0f;
_vertices = new VertexBuffer(Framework.GraphicsDevice,
VertexAttributeDeclarations.TexturePosition3D,
36,
BufferObjectUsage.Static);
// front
_vertices.SetTexCoord(0, 1.0f, 1.0f);
_vertices.SetTexCoord(1, 0.0f, 1.0f);
_vertices.SetTexCoord(2, 1.0f, 0.0f);
_vertices.SetTexCoord(3, 0.0f, 1.0f);
_vertices.SetTexCoord(4, 0.0f, 0.0f);
_vertices.SetTexCoord(5, 1.0f, 0.0f);
_vertices.SetPosition3D(0, -n, -n, -n);
_vertices.SetPosition3D(1, n, -n, -n);
_vertices.SetPosition3D(2, -n, n, -n);
_vertices.SetPosition3D(3, n, -n, -n);
_vertices.SetPosition3D(4, n, n, -n);
_vertices.SetPosition3D(5, -n, n, -n);
// left
_vertices.SetTexCoord(6, 1.0f, 1.0f);
_vertices.SetTexCoord(7, 0.0f, 1.0f);
_vertices.SetTexCoord(8, 1.0f, 0.0f);
_vertices.SetTexCoord(9, 0.0f, 1.0f);
_vertices.SetTexCoord(10, 0.0f, 0.0f);
_vertices.SetTexCoord(11, 1.0f, 0.0f);
_vertices.SetPosition3D(6, -n, -n, n);
_vertices.SetPosition3D(7, -n, -n, -n);
_vertices.SetPosition3D(8, -n, n, n);
_vertices.SetPosition3D(9, -n, -n, -n);
_vertices.SetPosition3D(10, -n, n, -n);
_vertices.SetPosition3D(11, -n, n, n);
// back
_vertices.SetTexCoord(12, 1.0f, 1.0f);
_vertices.SetTexCoord(13, 0.0f, 1.0f);
_vertices.SetTexCoord(14, 1.0f, 0.0f);
_vertices.SetTexCoord(15, 0.0f, 1.0f);
_vertices.SetTexCoord(16, 0.0f, 0.0f);
_vertices.SetTexCoord(17, 1.0f, 0.0f);
_vertices.SetPosition3D(12, n, -n, n);
_vertices.SetPosition3D(13, -n, -n, n);
_vertices.SetPosition3D(14, n, n, n);
_vertices.SetPosition3D(15, -n, -n, n);
_vertices.SetPosition3D(16, -n, n, n);
_vertices.SetPosition3D(17, n, n, n);
// right
_vertices.SetTexCoord(18, 1.0f, 1.0f);
_vertices.SetTexCoord(19, 0.0f, 1.0f);
_vertices.SetTexCoord(20, 1.0f, 0.0f);
_vertices.SetTexCoord(21, 0.0f, 1.0f);
_vertices.SetTexCoord(22, 0.0f, 0.0f);
_vertices.SetTexCoord(23, 1.0f, 0.0f);
_vertices.SetPosition3D(18, n, -n, -n);
_vertices.SetPosition3D(19, n, -n, n);
_vertices.SetPosition3D(20, n, n, -n);
_vertices.SetPosition3D(21, n, -n, n);
_vertices.SetPosition3D(22, n, n, n);
_vertices.SetPosition3D(23, n, n, -n);
// top
_vertices.SetTexCoord(24, 0.0f, 1.0f);
_vertices.SetTexCoord(25, 0.0f, 0.0f);
_vertices.SetTexCoord(26, 1.0f, 1.0f);
_vertices.SetTexCoord(27, 0.0f, 0.0f);
_vertices.SetTexCoord(28, 1.0f, 0.0f);
_vertices.SetTexCoord(29, 1.0f, 1.0f);
_vertices.SetPosition3D(24, n, n, n);
_vertices.SetPosition3D(25, -n, n, n);
_vertices.SetPosition3D(26, n, n, -n);
_vertices.SetPosition3D(27, -n, n, n);
_vertices.SetPosition3D(28, -n, n, -n);
_vertices.SetPosition3D(29, n, n, -n);
// bottom
_vertices.SetTexCoord(30, 0.0f, 1.0f);
_vertices.SetTexCoord(31, 0.0f, 0.0f);
_vertices.SetTexCoord(32, 1.0f, 1.0f);
_vertices.SetTexCoord(33, 0.0f, 0.0f);
_vertices.SetTexCoord(34, 1.0f, 0.0f);
_vertices.SetTexCoord(35, 1.0f, 1.0f);
_vertices.SetPosition3D(30, -n, -n, n);
_vertices.SetPosition3D(31, n, -n, n);
_vertices.SetPosition3D(32, -n, -n, -n);
_vertices.SetPosition3D(33, n, -n, n);
_vertices.SetPosition3D(34, n, -n, -n);
_vertices.SetPosition3D(35, -n, -n, -n);
}
public void Render()
{
var graphicsDevice = Framework.GraphicsDevice;
_renderState.Apply(graphicsDevice);
_blendState.Apply(graphicsDevice);
var shader = graphicsDevice.SimpleTextureShader;
graphicsDevice.BindShader(shader);
graphicsDevice.BindVertexBuffer(_vertices);
var modelViewMatrix = graphicsDevice.ViewContext.ModelViewMatrix;
// position at the origin, but keep current rotation
modelViewMatrix.M14 = 0.0f;
modelViewMatrix.M24 = 0.0f;
modelViewMatrix.M34 = 0.0f;
shader.SetModelViewMatrix(ref modelViewMatrix);
shader.SetProjectionMatrix(graphicsDevice.ViewContext.ProjectionMatrix);
// front
graphicsDevice.BindTexture(_front);
graphicsDevice.RenderTriangles(0, 2);
// left
graphicsDevice.BindTexture(_left);
graphicsDevice.RenderTriangles(6, 2);
// back
graphicsDevice.BindTexture(_back);
graphicsDevice.RenderTriangles(12, 2);
// right
graphicsDevice.BindTexture(_right);
graphicsDevice.RenderTriangles(18, 2);
// top
graphicsDevice.BindTexture(_top);
graphicsDevice.RenderTriangles(24, 2);
// bottom
graphicsDevice.BindTexture(_bottom);
graphicsDevice.RenderTriangles(30, 2);
graphicsDevice.UnbindShader();
graphicsDevice.UnbindVertexBuffer();
}
}
}