private void CreateVertexBuffer()
{
_vertexCount = _xRes * _yRes;
var vertexStream = new DataStream(_vertexCount * PointVertex.SizeOf, true, true);
// store pixel coordinates in each vertex
for (short y = 0; y < _yRes; y++)
{
for (short x = 0; x < _xRes; x++)
{
var pt = new PointVertex(x, y);
vertexStream.Write(pt);
}
}
vertexStream.Position = 0;
// create vertex buffer
_vertexBuffer = new Buffer(_dxDevice, vertexStream,
_vertexCount * PointVertex.SizeOf, ResourceUsage.Immutable,
BindFlags.VertexBuffer,
CpuAccessFlags.None, ResourceOptionFlags.None);
vertexStream.Close();
}
protected override void LoadGraphicsContent(bool loadAllContent)
{
if (loadAllContent)
{
ContentManager cm = PrimalDevistation.Instance.CM;
GraphicsDevice gd = GraphicsDevice;
Random r = new Random();
// Load the standard point sprite render effect
_renderEffect = cm.Load <Effect>(@"Shaders/PointSpriteRender");
_texture = cm.Load <Texture2D>(@"Sprites/particle2x2");
// Create the vertex buffer
_vertexBuffer = new VertexBuffer(gd, _maxParticles * PointVertex.Size, ResourceUsage.Points | ResourceUsage.WriteOnly, ResourceManagementMode.Automatic);
// Create the declaration
_vertexDeclaration = new VertexDeclaration(gd, PointVertex.Elements);
// init the points
_pointVertices = new PointVertex[_maxParticles];
_particles = new cCPUParticle[_maxParticles];
for (int i = 0; i < _maxParticles; i++)
{
_pointVertices[i] = new PointVertex();
_pointVertices[i].position = new Vector3(-100, -100, 0);
_pointVertices[i].color = _colors[r.Next(0, _colors.Length)].ToVector4();
_pointVertices[i].pointSize = 2;
_particles[i] = new cCPUParticle();
}
// Create a matrix to convert from pixel coordinates to clip space
// So, before transformation, the screen boundaries go from 0 to (say) 640 horizontally,
// and 0 to (say) 480 vertically. After transformation, they go from -1 to 1 horizontally,
// and -1 to 1 vertically. Note in pixel coordinates, increasing Y values are further down
// the screen, while in clip space, increasing Y values are further up the screen -- so there
// is a Y scaling factor of -1.
float viewportWidth = (float)gd.Viewport.Width;
float viewportHeight = (float)gd.Viewport.Height;
float scaleX = 1.0f / (viewportWidth / 2);
float scaleY = 1.0f / (viewportHeight / 2);
_proj = Matrix.CreateScale(scaleX, scaleY, 1) *
Matrix.CreateScale(1, -1, 1) *
Matrix.CreateTranslation(-1, 1, 0);
}
}
private void FillBlobVB(Matrix pmatWorldView, Matrix pmatProjection)
{
ScreenVertex[] pBlobVertex = (ScreenVertex[])pBlobVB.Lock(0, LockFlags.None);
PointVertex[] blobPos = new PointVertex[blobPoints.Length];
for (int i = 0; i < blobPoints.Length; i++)
{
//transform point to camera space
Vector4 blobPosCamera = Vector3.Transform(blobPoints[i].pos, pmatWorldView);
blobPos[i] = blobPoints[i];
blobPos[i].pos.X = blobPosCamera.X;
blobPos[i].pos.Y = blobPosCamera.Y;
blobPos[i].pos.Z = blobPosCamera.Z;
}
int posCount = 0;
for (int i = 0; i < blobPoints.Length; i++)
{
Vector4 blobScreenPos;
// For calculating billboarding
Vector4 billOfs = new Vector4(blobPos[i].size, blobPos[i].size, blobPos[i].pos.Z, 1);
Vector4 billOfsScreen;
// Transform to screenspace
blobScreenPos = Vector3.Transform(blobPos[i].pos, pmatProjection);
billOfsScreen = Vector4.Transform(billOfs, pmatProjection);
// Project
blobScreenPos = Vector4.Scale(blobScreenPos, 1.0f / blobScreenPos.W);
billOfsScreen = Vector4.Scale(billOfsScreen, 1.0f / billOfsScreen.W);
Vector2[] vTexCoords = new Vector2[]
{
new Vector2(0.0f, 0.0f),
new Vector2(1.0f, 0.0f),
new Vector2(0.0f, 1.0f),
new Vector2(0.0f, 1.0f),
new Vector2(1.0f, 0.0f),
new Vector2(1.0f, 1.0f)
};
Vector4[] vPosOffset = new Vector4[]
{
new Vector4(-billOfsScreen.X, -billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(billOfsScreen.X, -billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(-billOfsScreen.X, billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(-billOfsScreen.X, billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(billOfsScreen.X, -billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(billOfsScreen.X, billOfsScreen.Y, 0.0f, 0.0f)
};
SurfaceDescription pBackBufferSurfaceDesc = device.GetBackBuffer(0, 0, BackBufferType.Mono).Description;
// Set constants across quad
for (int j = 0; j < 6; j++)
{
// Scale to pixels
pBlobVertex[posCount].pos = Vector4.Add(blobScreenPos, vPosOffset[j]);
pBlobVertex[posCount].pos.X *= pBackBufferSurfaceDesc.Width;
pBlobVertex[posCount].pos.Y *= pBackBufferSurfaceDesc.Height;
pBlobVertex[posCount].pos.X += 0.5f * pBackBufferSurfaceDesc.Width;
pBlobVertex[posCount].pos.Y += 0.5f * pBackBufferSurfaceDesc.Height;
pBlobVertex[posCount].tCurr = vTexCoords[j];
pBlobVertex[posCount].tBack = new Vector2((0.5f + pBlobVertex[posCount].pos.X) * (1.0f / pBackBufferSurfaceDesc.Width),
(0.5f + pBlobVertex[posCount].pos.Y) * (1.0f / pBackBufferSurfaceDesc.Height));
pBlobVertex[posCount].fSize = blobPos[i].size;
pBlobVertex[posCount].vColor = blobPos[i].color;
posCount++;
}
}
pBlobVB.Unlock();
}
private void FillBlobVB(Matrix pmatWorldView, Matrix pmatProjection, ref PointVertex[] blobPoints)
{
ScreenVertex[] pBlobVertex = (ScreenVertex[])pBlobVB.Lock(0, LockFlags.None);
PointVertex[] blobPos = new PointVertex[blobPoints.Length];
for (int i = 0; i < blobPoints.Length; i++)
{
//transform point to camera space
Vector4 blobPosCamera = Vector3.Transform(blobPoints[i].pos, pmatWorldView);
blobPos[i] = blobPoints[i];
blobPos[i].pos.X = blobPosCamera.X;
blobPos[i].pos.Y = blobPosCamera.Y;
blobPos[i].pos.Z = blobPosCamera.Z;
}
int posCount = 0;
for (int i = 0; i < blobPoints.Length; i++)
{
Vector4 blobScreenPos;
// For calculating billboarding
Vector4 billOfs = new Vector4(blobPos[i].size, blobPos[i].size, blobPos[i].pos.Z, 1);
Vector4 billOfsScreen;
// Transform to screenspace
blobScreenPos = Vector3.Transform(blobPos[i].pos, pmatProjection);
billOfsScreen = Vector4.Transform(billOfs, pmatProjection);
// Project
blobScreenPos = Vector4.Scale(blobScreenPos, 1.0f / blobScreenPos.W);
billOfsScreen = Vector4.Scale(billOfsScreen, 1.0f / billOfsScreen.W);
Vector2[] vTexCoords = new Vector2[]
{
new Vector2(0.0f, 0.0f),
new Vector2(1.0f, 0.0f),
new Vector2(0.0f, 1.0f),
new Vector2(0.0f, 1.0f),
new Vector2(1.0f, 0.0f),
new Vector2(1.0f, 1.0f)
};
Vector4[] vPosOffset = new Vector4[]
{
new Vector4(-billOfsScreen.X,-billOfsScreen.Y, 0.0f, 0.0f),
new Vector4( billOfsScreen.X,-billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(-billOfsScreen.X, billOfsScreen.Y, 0.0f, 0.0f),
new Vector4(-billOfsScreen.X, billOfsScreen.Y, 0.0f, 0.0f),
new Vector4( billOfsScreen.X,-billOfsScreen.Y, 0.0f, 0.0f),
new Vector4( billOfsScreen.X, billOfsScreen.Y, 0.0f, 0.0f)
};
SurfaceDescription pBackBufferSurfaceDesc = device.GetBackBuffer(0, 0, BackBufferType.Left).Description;
// Set constants across quad
for (int j = 0; j < 6; j++)
{
// Scale to pixels
pBlobVertex[posCount].pos = Vector4.Add(blobScreenPos, vPosOffset[j]);
pBlobVertex[posCount].pos.X *= pBackBufferSurfaceDesc.Width;
pBlobVertex[posCount].pos.Y *= pBackBufferSurfaceDesc.Height;
pBlobVertex[posCount].pos.X += 0.5f * pBackBufferSurfaceDesc.Width;
pBlobVertex[posCount].pos.Y += 0.5f * pBackBufferSurfaceDesc.Height;
pBlobVertex[posCount].tCurr = vTexCoords[j];
pBlobVertex[posCount].tBack = new Vector2((0.5f + pBlobVertex[posCount].pos.X) * (1.0f / pBackBufferSurfaceDesc.Width),
(0.5f + pBlobVertex[posCount].pos.Y) * (1.0f / pBackBufferSurfaceDesc.Height));
pBlobVertex[posCount].fSize = blobPos[i].size;
pBlobVertex[posCount].vColor = blobPoints[i].color;
posCount++;
}
}
pBlobVB.Unlock();
}
private void CreateVertexBuffer()
{
_vertexCount = _xRes*_yRes;
var vertexStream = new DataStream(_vertexCount*PointVertex.SizeOf, true, true);
// store pixel coordinates in each vertex
for (short y = 0; y < _yRes; y++)
{
for (short x = 0; x < _xRes; x++)
{
var pt = new PointVertex(x, y);
vertexStream.Write(pt);
}
}
vertexStream.Position = 0;
// create vertex buffer
_vertexBuffer = new Buffer(_dxDevice, vertexStream,
_vertexCount*PointVertex.SizeOf, ResourceUsage.Immutable,
BindFlags.VertexBuffer,
CpuAccessFlags.None, ResourceOptionFlags.None);
vertexStream.Close();
}
private void AddEdge(RotationTreeNode p, RotationTreeNode q)
{
var pVertex = new PointVertex(p.Point);
var qVertex = new PointVertex(q.Point);
if (_graph.ContainsVertex(pVertex) && _graph.ContainsVertex(qVertex))
_graph.AddEdge(new Edge<PointVertex>(pVertex, qVertex));
}