private void GenerateRoom(GraphicsDevice graphicsDevice,
float floorSize,
float wallHeight,
float floorTileFactor,
float ceilingTileFactor,
float wallTileFactorX,
float wallTileFactorY)
{
// The room is a cube with all surface normal pointing inwards.
// We need a total of 36 vertices in the vertex buffer.
// 6 faces to the room.
// Each face is made of 2 triangles requiring 6 vertices.
vertices = new NormalMappedVertex[36];
GenerateRoomGeometry(floorSize, wallHeight, floorTileFactor,
ceilingTileFactor, wallTileFactorX, wallTileFactorY);
// Calculate the tangent vectors for each triangle in the room.
Vector4 tangent;
for (int i = 0; i < vertices.Length; i += 3)
{
NormalMappedVertex.CalcTangent(
ref vertices[i].Position,
ref vertices[i + 1].Position,
ref vertices[i + 2].Position,
ref vertices[i].TexCoord,
ref vertices[i + 1].TexCoord,
ref vertices[i + 2].TexCoord,
ref vertices[i].Normal,
out tangent);
vertices[i].Tangent = tangent;
vertices[i + 1].Tangent = tangent;
vertices[i + 2].Tangent = tangent;
}
// Create and fill the vertex buffer with the room geometry.
vertexBuffer = new VertexBuffer(graphicsDevice, typeof(NormalMappedVertex), vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
}
private void GenerateRoomGeometry(float floorSize,
float wallHeight,
float floorTileFactor,
float ceilingTileFactor,
float wallTileFactorX,
float wallTileFactorY)
{
/* 5--------6
* |\ /|
* | 4----7 |
* | | | |
* | | | |
* | 0----3 |
* |/ \|
* 1--------2
*
* +z wall: 6512 tri1: 651 tri2: 126
* -z wall: 4730 tri1: 473 tri2: 304
* +x wall: 7623 tri1: 762 tri2: 237
* -x wall: 5401 tri1: 540 tri2: 015
*
* +y ceiling: 5674 tri1: 567 tri2: 745
* -y floor: 0321 tri1: 032 tri2: 210
*/
int offset = 0;
float halfSize = floorSize * 0.5f;
Vector3[] corners =
{
new Vector3(-halfSize, 0.0f, -halfSize), // 0
new Vector3(-halfSize, 0.0f, halfSize), // 1
new Vector3(halfSize, 0.0f, halfSize), // 2
new Vector3(halfSize, 0.0f, -halfSize), // 3
new Vector3(-halfSize, wallHeight, -halfSize), // 4
new Vector3(-halfSize, wallHeight, halfSize), // 5
new Vector3(halfSize, wallHeight, halfSize), // 6
new Vector3(halfSize, wallHeight, -halfSize), // 7
};
Vector2[] wallTexCoords =
{
new Vector2(0.0f, 0.0f), // top left corner
new Vector2(wallTileFactorX, 0.0f), // top right corner
new Vector2(wallTileFactorX, wallTileFactorY), // bottom right corner
new Vector2(0.0f, wallTileFactorY) // bottom left corner
};
Vector2[] floorTexCoords =
{
new Vector2(0.0f, 0.0f), // top left corner
new Vector2(floorTileFactor, 0.0f), // top right corner
new Vector2(floorTileFactor, floorTileFactor), // bottom right corner
new Vector2(0.0f, floorTileFactor) // bottom left corner
};
Vector2[] ceilingTexCoords =
{
new Vector2(0.0f, 0.0f), // top left corner
new Vector2(ceilingTileFactor, 0.0f), // top right corner
new Vector2(ceilingTileFactor, ceilingTileFactor), // bottom right corner
new Vector2(0.0f, ceilingTileFactor) // bottom left corner
};
wallsIndex = offset;
// -z wall: 4730 tri1: 473 tri2: 304
vertices[offset++] = new NormalMappedVertex(corners[4], wallTexCoords[0], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], wallTexCoords[1], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], wallTexCoords[2], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], wallTexCoords[2], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], wallTexCoords[3], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[4], wallTexCoords[0], Vector3.Backward, Vector4.Zero);
// +z wall: 6512 tri1: 651 tri2: 126
vertices[offset++] = new NormalMappedVertex(corners[6], wallTexCoords[0], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[5], wallTexCoords[1], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], wallTexCoords[2], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], wallTexCoords[2], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], wallTexCoords[3], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[6], wallTexCoords[0], Vector3.Forward, Vector4.Zero);
// -x wall: 5401 tri1: 540 tri2: 015
vertices[offset++] = new NormalMappedVertex(corners[5], wallTexCoords[0], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[4], wallTexCoords[1], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], wallTexCoords[2], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], wallTexCoords[2], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], wallTexCoords[3], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[5], wallTexCoords[0], Vector3.Right, Vector4.Zero);
// +x wall: 7623 tri1: 762 tri2: 237
vertices[offset++] = new NormalMappedVertex(corners[7], wallTexCoords[0], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[6], wallTexCoords[1], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], wallTexCoords[2], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], wallTexCoords[2], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], wallTexCoords[3], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], wallTexCoords[0], Vector3.Left, Vector4.Zero);
// +y ceiling: 5674 tri1: 567 tri2: 745
ceilingIndex = offset;
vertices[offset++] = new NormalMappedVertex(corners[5], ceilingTexCoords[0], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[6], ceilingTexCoords[1], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], ceilingTexCoords[2], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], ceilingTexCoords[2], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[4], ceilingTexCoords[3], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[5], ceilingTexCoords[0], Vector3.Down, Vector4.Zero);
// -y floor: 0321 tri1: 032 tri2: 210
floorIndex = offset;
vertices[offset++] = new NormalMappedVertex(corners[0], floorTexCoords[0], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], floorTexCoords[1], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], floorTexCoords[2], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], floorTexCoords[2], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], floorTexCoords[3], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], floorTexCoords[0], Vector3.Up, Vector4.Zero);
}
private void GenerateRoomGeometry(float floorSize,
float wallHeight,
float floorTileFactor,
float ceilingTileFactor,
float wallTileFactorX,
float wallTileFactorY)
{
/* 5--------6
* |\ /|
* | 4----7 |
* | | | |
* | | | |
* | 0----3 |
* |/ \|
* 1--------2
*
* +z wall: 6512 tri1: 651 tri2: 126
* -z wall: 4730 tri1: 473 tri2: 304
* +x wall: 7623 tri1: 762 tri2: 237
* -x wall: 5401 tri1: 540 tri2: 015
*
* +y ceiling: 5674 tri1: 567 tri2: 745
* -y floor: 0321 tri1: 032 tri2: 210
*/
int offset = 0;
float halfSize = floorSize * 0.5f;
Vector3[] corners =
{
new Vector3(-halfSize, 0.0f, -halfSize), // 0
new Vector3(-halfSize, 0.0f, halfSize), // 1
new Vector3( halfSize, 0.0f, halfSize), // 2
new Vector3( halfSize, 0.0f, -halfSize), // 3
new Vector3(-halfSize, wallHeight, -halfSize), // 4
new Vector3(-halfSize, wallHeight, halfSize), // 5
new Vector3( halfSize, wallHeight, halfSize), // 6
new Vector3( halfSize, wallHeight, -halfSize), // 7
};
Vector2[] wallTexCoords =
{
new Vector2(0.0f, 0.0f), // top left corner
new Vector2(wallTileFactorX, 0.0f), // top right corner
new Vector2(wallTileFactorX, wallTileFactorY), // bottom right corner
new Vector2(0.0f, wallTileFactorY) // bottom left corner
};
Vector2[] floorTexCoords =
{
new Vector2(0.0f, 0.0f), // top left corner
new Vector2(floorTileFactor, 0.0f), // top right corner
new Vector2(floorTileFactor, floorTileFactor), // bottom right corner
new Vector2(0.0f, floorTileFactor) // bottom left corner
};
Vector2[] ceilingTexCoords =
{
new Vector2(0.0f, 0.0f), // top left corner
new Vector2(ceilingTileFactor, 0.0f), // top right corner
new Vector2(ceilingTileFactor, ceilingTileFactor), // bottom right corner
new Vector2(0.0f, ceilingTileFactor) // bottom left corner
};
wallsIndex = offset;
// -z wall: 4730 tri1: 473 tri2: 304
vertices[offset++] = new NormalMappedVertex(corners[4], wallTexCoords[0], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], wallTexCoords[1], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], wallTexCoords[2], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], wallTexCoords[2], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], wallTexCoords[3], Vector3.Backward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[4], wallTexCoords[0], Vector3.Backward, Vector4.Zero);
// +z wall: 6512 tri1: 651 tri2: 126
vertices[offset++] = new NormalMappedVertex(corners[6], wallTexCoords[0], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[5], wallTexCoords[1], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], wallTexCoords[2], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], wallTexCoords[2], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], wallTexCoords[3], Vector3.Forward, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[6], wallTexCoords[0], Vector3.Forward, Vector4.Zero);
// -x wall: 5401 tri1: 540 tri2: 015
vertices[offset++] = new NormalMappedVertex(corners[5], wallTexCoords[0], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[4], wallTexCoords[1], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], wallTexCoords[2], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], wallTexCoords[2], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], wallTexCoords[3], Vector3.Right, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[5], wallTexCoords[0], Vector3.Right, Vector4.Zero);
// +x wall: 7623 tri1: 762 tri2: 237
vertices[offset++] = new NormalMappedVertex(corners[7], wallTexCoords[0], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[6], wallTexCoords[1], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], wallTexCoords[2], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], wallTexCoords[2], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], wallTexCoords[3], Vector3.Left, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], wallTexCoords[0], Vector3.Left, Vector4.Zero);
// +y ceiling: 5674 tri1: 567 tri2: 745
ceilingIndex = offset;
vertices[offset++] = new NormalMappedVertex(corners[5], ceilingTexCoords[0], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[6], ceilingTexCoords[1], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], ceilingTexCoords[2], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[7], ceilingTexCoords[2], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[4], ceilingTexCoords[3], Vector3.Down, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[5], ceilingTexCoords[0], Vector3.Down, Vector4.Zero);
// -y floor: 0321 tri1: 032 tri2: 210
floorIndex = offset;
vertices[offset++] = new NormalMappedVertex(corners[0], floorTexCoords[0], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[3], floorTexCoords[1], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], floorTexCoords[2], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[2], floorTexCoords[2], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[1], floorTexCoords[3], Vector3.Up, Vector4.Zero);
vertices[offset++] = new NormalMappedVertex(corners[0], floorTexCoords[0], Vector3.Up, Vector4.Zero);
}