public PatchGeomipmap(LandscapeGeomipmap landscape, Vector3 pos, Matrix rotation, int heightX, int heightZ, int patchSize, int mapSize, int mapDetail)
: base(landscape.Scene, pos, rotation, Vector3.One)
{
this.landscape = landscape;
this.patchSize = patchSize;
this.mapSize = mapSize;
this.mapDetail = mapDetail;
this.vertexDetail = 1;
this.xRatioFull = 1.0f / (mapSize + 1);
this.zRatioFull = 1.0f / (mapSize + 1);
this.xRatioPatch = 16.0f / (patchSize + 1);
this.zRatioPatch = 16.0f / (patchSize + 1);
// Store Patch offsets for the heightmap.
setObject(pos.X, pos.Y, pos.Z);
// Store pointer to first byte of the height data for this patch.
this.heightX = heightX;
this.heightZ = heightZ;
//this.worldX = worldX;
//this.worldZ = worldZ;
maxHeight = landscape.getHeightMap(heightX, heightZ);
indexX = (heightX * mapSize) / (mapSize * patchSize);
indexZ = (heightZ * mapSize) / (mapSize * patchSize);
// Initialize flags
initVertexBuffer();
drawIndexedPrimitives();
calculateBoundingSphere();
}
/// <summary>
/// draw landscape in local space
/// (fill vertex array with data)
/// </summary>
public override void drawIndexedPrimitives()
{
int vertCount = 0;
float x = 0.0f;
float z = 0.0f;
float xTex = 0.0f;
float zTex = 0.0f;
float xTexFull = 0.0f;
float zTexFull = 0.0f;
xTex = 0.0f;
zTex = 0.0f;
xTexFull = heightX * xRatioFull;
zTexFull = heightZ * zRatioFull;
for (int zDir = 0; zDir <= patchSize; zDir += vertexDetail)
{
for (int xDir = 0; xDir <= patchSize; xDir += vertexDetail)
{
// just draw vertices once, rest does index buffer
indexedVerts[vertCount].Position.X = x;
indexedVerts[vertCount].Position.Z = z;
//save maximum height of patch for bounding box
float height = landscape.getHeightMap(heightX + xDir, heightZ + zDir);
if (maxHeight < height)
{
maxHeight = height * scale.Z;
}
indexedVerts[vertCount].Position.Y = height;
// normals for lightning
indexedVerts[vertCount].Normal.X = 0.0f;
indexedVerts[vertCount].Normal.Y = 1.0f;
indexedVerts[vertCount].Normal.Z = 0.0f;
//indexedVerts[vertCount].Color = Color.Red;
// base texture coords
indexedVerts[vertCount].TextureCoordinate.X = xTexFull;
indexedVerts[vertCount].TextureCoordinate.Y = zTexFull;
// detail texture coords
indexedVerts[vertCount].TextureCoordinate1.X = xTex;
indexedVerts[vertCount].TextureCoordinate1.Y = zTex;
x += vertexDetail * landscape.Scale.X;
xTex += xRatioPatch;
xTexFull += xRatioFull;
vertCount++;
}
z -= vertexDetail * landscape.Scale.Z;
//zTex += vertexDetail * landscape.Scale.Z;
zTex += zRatioPatch;
zTexFull += zRatioFull;
xTex = 0.0f;
xTexFull = heightX * xRatioFull;
x = 0.0f;
}
//skirt
x = 0.0f;
z = 0.0f;
xTex = 0.0f;
zTex = 0.0f;
xTexFull = heightX * xRatioFull;
zTexFull = heightZ * zRatioFull;
for (int xDir = 0; xDir <= patchSize; xDir += vertexDetail)
{
indexedVerts[vertCount].Position.X = x;
indexedVerts[vertCount].Position.Y = -1.0f;
indexedVerts[vertCount].Position.Z = z;
// base texture coords
indexedVerts[vertCount].TextureCoordinate.X = xTexFull;
indexedVerts[vertCount].TextureCoordinate.Y = zTexFull;
// detail texture coords
indexedVerts[vertCount].TextureCoordinate1.X = xTex;
indexedVerts[vertCount].TextureCoordinate1.Y = zTex;
x += vertexDetail * landscape.Scale.X;
xTex += xRatioPatch;
xTexFull += xRatioFull;
vertCount++;
}
x -= vertexDetail * landscape.Scale.X;
xTex -= xRatioPatch;
xTexFull -= xRatioFull;
for (int zDir = 0; zDir <= patchSize; zDir += vertexDetail)
{
indexedVerts[vertCount].Position.X = x;
indexedVerts[vertCount].Position.Y = -1.0f;
indexedVerts[vertCount].Position.Z = z;
// base texture coords
indexedVerts[vertCount].TextureCoordinate.X = xTexFull;
indexedVerts[vertCount].TextureCoordinate.Y = zTexFull;
// detail texture coords
indexedVerts[vertCount].TextureCoordinate1.X = xTex;
indexedVerts[vertCount].TextureCoordinate1.Y = zTex;
z -= vertexDetail * landscape.Scale.Z;
zTex += zRatioPatch;
zTexFull += zRatioFull;
vertCount++;
}
z += vertexDetail * landscape.Scale.Z;
zTex -= zRatioPatch;
zTexFull -= zRatioFull;
for (int xDir = patchSize; xDir >= 0; xDir -= vertexDetail)
{
indexedVerts[vertCount].Position.X = x;
indexedVerts[vertCount].Position.Y = -1.0f;
indexedVerts[vertCount].Position.Z = z;
// base texture coords
indexedVerts[vertCount].TextureCoordinate.X = xTexFull;
indexedVerts[vertCount].TextureCoordinate.Y = zTexFull;
// detail texture coords
indexedVerts[vertCount].TextureCoordinate1.X = xTex;
indexedVerts[vertCount].TextureCoordinate1.Y = zTex;
x -= vertexDetail * landscape.Scale.X;
xTex -= xRatioPatch;
xTexFull -= xRatioFull;
vertCount++;
}
x += vertexDetail * landscape.Scale.X;
xTex -= xRatioPatch;
xTexFull -= xRatioFull;
for (int zDir = patchSize; zDir >= 0; zDir -= vertexDetail)
{
indexedVerts[vertCount].Position.X = x;
indexedVerts[vertCount].Position.Y = -1.0f;
indexedVerts[vertCount].Position.Z = z;
// base texture coords
indexedVerts[vertCount].TextureCoordinate.X = xTexFull;
indexedVerts[vertCount].TextureCoordinate.Y = zTexFull;
// detail texture coords
indexedVerts[vertCount].TextureCoordinate1.X = xTex;
indexedVerts[vertCount].TextureCoordinate1.Y = zTex;
z += vertexDetail * landscape.Scale.Z;
zTex -= zRatioPatch;
zTexFull -= zRatioFull;
vertCount++;
}
//calculateNormals();
vbIndexed.SetData <PositionNormalMultiTexture>(indexedVerts);
}