private void GenerateGeometry()
{
float spacing = 1000.0f;
// Create vertices
numVertices = numRows * numCols;
numIndices = 3 * ((numRows - 1) * (numCols - 1) * 2);
VertexPosTex[] vertices = new VertexPosTex[numVertices];
float halfWidth = (float)(numRows - 1) * spacing * 0.5f;
float halfDepth = (float)(numCols - 1) * spacing * 0.5f;
float du = 1.0f / (numRows - 1);
float dv = 1.0f / (numCols - 1);
for (int i = 0; i < numRows; i++)
{
float z = (halfDepth - i * spacing) * -1.0f;
for (int j = 0; j < numCols; j++)
{
float x = -halfWidth + j * spacing;
float y = height;
vertices[i * numCols + j].pos = new Vector3(x, y, z);
vertices[i * numCols + j].tex.X = du * j * textureScale;
vertices[i * numCols + j].tex.Y = dv * i * textureScale;
}
}
// Create indices
int[] indices = new int[numIndices];
int k = 0;
for (int i = 0; i < numCols - 1; i++)
{
for (int j = 0; j < numRows - 1; j++)
{
indices[k] = i * numRows + j;
indices[k + 1] = i * numRows + j + 1;
indices[k + 2] = (i + 1) * numRows + j;
indices[k + 3] = (i + 1) * numRows + j;
indices[k + 4] = i * numRows + j + 1;
indices[k + 5] = (i + 1) * numRows + j + 1;
k += 6;
}
}
// Create Vertex Buffer
vertexBuffer = new VertexBuffer(device, VertexPosTex.VertexLayout,
numVertices, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
// Create Index Buffer
indexBuffer = new IndexBuffer(device, IndexElementSize.ThirtyTwoBits,
numIndices, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
}
private void GenerateGeometry()
{
// Create vertices
VertexPosTex[] vertices = new VertexPosTex[4];
vertices[0] = new VertexPosTex(new Vector3(-size.X, -size.Y, 0.0f), new Vector2(0.0f, 1.0f));
vertices[1] = new VertexPosTex(new Vector3(-size.X, +size.Y, 0.0f), new Vector2(0.0f, 0.0f));
vertices[2] = new VertexPosTex(new Vector3(+size.X, -size.Y, 0.0f), new Vector2(1.0f, 1.0f));
vertices[3] = new VertexPosTex(new Vector3(+size.X, +size.Y, 0.0f), new Vector2(1.0f, 0.0f));
vertexBuffer = new VertexBuffer(device, VertexPosTex.VertexLayout,
vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
// Create AABB
aabb = new BoundingBox(new Vector3(position.X - size.X, position.Y - size.Y, position.Z - size.X),
new Vector3(position.X + size.X, position.Y + size.Y, position.Z + size.X));
}
private void GenerateLight()
{
// Create light vertices
VertexPosTex[] vertices = new VertexPosTex[]
{
new VertexPosTex(new Vector3(-1.0f, -1.0f, 0.0f), new Vector2(0.0f, 1.0f)),
new VertexPosTex(new Vector3(-1.0f, 1.0f, 0.0f), new Vector2(0.0f, 0.0f)),
new VertexPosTex(new Vector3(1.0f, -1.0f, 0.0f), new Vector2(1.0f, 1.0f)),
new VertexPosTex(new Vector3(1.0f, 1.0f, 0.0f), new Vector2(1.0f, 0.0f))
};
// Create vertex buffer
vertexBuffer = new VertexBuffer(device, VertexPosTex.VertexLayout,
vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
BuildAABB();
}
private void GenerateVertices()
{
// Create full screen quad vertices in screen space
VertexPosTex[] vertices = new VertexPosTex[]
{
new VertexPosTex(new Vector3(-1.0f, -1.0f, 0.0f), new Vector2(0.0f, 1.0f)),
new VertexPosTex(new Vector3(-1.0f, 1.0f, 0.0f), new Vector2(0.0f, 0.0f)),
new VertexPosTex(new Vector3(1.0f, -1.0f, 0.0f), new Vector2(1.0f, 1.0f)),
new VertexPosTex(new Vector3(1.0f, -1.0f, 0.0f), new Vector2(1.0f, 1.0f)),
new VertexPosTex(new Vector3(-1.0f, 1.0f, 0.0f), new Vector2(0.0f, 0.0f)),
new VertexPosTex(new Vector3(1.0f, 1.0f, 0.0f), new Vector2(1.0f, 0.0f))
};
// Create vertex buffer
vertexBuffer = new VertexBuffer(device, VertexPosTex.VertexLayout,
vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
}
private void GenerateGeometry()
{
int numStacks = 30;
int numSlices = 30;
List <VertexPosTex> vertexList = new List <VertexPosTex>();
List <int> indexList = new List <int>();
float phiStep = (float)(MathHelper.Pi / numStacks);
// do not count the poles as rings
int numRings = numStacks - 1;
// Compute vertices for each stack ring.
for (int i = 1; i <= numRings; ++i)
{
float phi = i * phiStep;
// vertices of ring
float thetaStep = 2.0f * (float)(MathHelper.Pi / numSlices);
for (int j = 0; j <= numSlices; ++j)
{
float theta = j * thetaStep;
VertexPosTex v = new VertexPosTex();
// spherical to cartesian
v.pos.X = radius * (float)Math.Sin(phi) * (float)Math.Cos(theta);
v.pos.Y = radius * (float)Math.Cos(phi);
v.pos.Z = radius * (float)Math.Sin(phi) * (float)Math.Sin(theta);
v.tex.X = theta / (2.0f * MathHelper.Pi);
v.tex.Y = phi / MathHelper.Pi;
vertexList.Add(v);
}
}
// poles: note that there will be texture coordinate distortion
vertexList.Add(new VertexPosTex(new Vector3(0.0f, -radius, 0.0f),
new Vector2(0.0f, 1.0f)));
vertexList.Add(new VertexPosTex(new Vector3(0.0f, radius, 0.0f),
new Vector2(0.0f, 0.0f)));
int northPoleIndex = vertexList.ToArray().Length - 1;
int southPoleIndex = vertexList.ToArray().Length - 2;
int numRingVertices = numSlices + 1;
// Compute indices for inner stacks (not connected to poles).
for (int i = 0; i < numStacks - 2; ++i)
{
for (int j = 0; j < numSlices; ++j)
{
indexList.Add(i * numRingVertices + j);
indexList.Add(i * numRingVertices + j + 1);
indexList.Add((i + 1) * numRingVertices + j);
indexList.Add((i + 1) * numRingVertices + j);
indexList.Add(i * numRingVertices + j + 1);
indexList.Add((i + 1) * numRingVertices + j + 1);
}
}
// Compute indices for top stack. The top stack was written
// first to the vertex buffer.
for (int i = 0; i < numSlices; ++i)
{
indexList.Add(northPoleIndex);
indexList.Add(i + 1);
indexList.Add(i);
}
// Compute indices for bottom stack. The bottom stack was written
// last to the vertex buffer, so we need to offset to the index
// of first vertex in the last ring.
int baseIndex = (numRings - 1) * numRingVertices;
for (int i = 0; i < numSlices; ++i)
{
indexList.Add(southPoleIndex);
indexList.Add(baseIndex + i);
indexList.Add(baseIndex + i + 1);
}
VertexPosTex[] vertices = vertexList.ToArray();
int[] indices = indexList.ToArray();
numVertices = vertices.Length;
numIndices = indices.Length;
// Create vertex buffer
vertexBuffer = new VertexBuffer(device, VertexPosTex.VertexLayout,
vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
// Create index buffer
indexBuffer = new IndexBuffer(device, IndexElementSize.ThirtyTwoBits,
indices.Length, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
}
