public override void DoCreateTile(int level, int tx, int ty, List <TileStorage.Slot> slot)
{
var gpuSlot = slot[0] as GPUTileStorage.GPUSlot;
if (gpuSlot == null)
{
throw new NullReferenceException("gpuSlot");
}
var tileWidth = gpuSlot.Owner.TileSize;
var tileSize = tileWidth - (1 + GetBorder() * 2);
//var parentTile = FindTile(level - 1, tx / 2, ty / 2, false, true);
var rootQuadSize = TerrainNode.TerrainQuadRoot.Length;
var offset = Vector4d.Zero();
offset.x = ((double)tx / (1 << level) - 0.5) * rootQuadSize;
offset.y = ((double)ty / (1 << level) - 0.5) * rootQuadSize;
offset.z = rootQuadSize / (1 << level);
offset.w = TerrainNode.Body.Radius;
ElevationMaterial.SetFloat("_TileSize", tileSize);
ElevationMaterial.SetFloat("_Amplitude", 32.0f);
ElevationMaterial.SetFloat("_Frequency", 128.0f);
ElevationMaterial.SetVector("_Offset", offset.ToVector4());
ElevationMaterial.SetMatrix("_LocalToWorld", TerrainNode.FaceToLocal.ToMatrix4x4());
if (TerrainNode.Body.NPS != null)
{
TerrainNode.Body.NPS.SetUniforms(ElevationMaterial);
}
if (TerrainNode.Body.TCCPS != null)
{
TerrainNode.Body.TCCPS.UpdateUniforms(ElevationMaterial);
}
Graphics.Blit(null, gpuSlot.Texture, ElevationMaterial);
base.DoCreateTile(level, tx, ty, slot);
}
/// <summary>
/// This function creates the elevations data and is called by the <see cref="Tile.Tasks.CreateTileTask"/> when the task is run by the <see cref="Utilities.Schedular"/>.
/// The functions needs the tiles parent data to have already been created. If it has not the program will abort.
/// </summary>
/// <param name="level"></param>
/// <param name="tx"></param>
/// <param name="ty"></param>
/// <param name="slot"></param>
public override void DoCreateTile(int level, int tx, int ty, List <TileStorage.Slot> slot)
{
var gpuSlot = slot[0] as GPUTileStorage.GPUSlot;
if (gpuSlot == null)
{
throw new NullReferenceException("gpuSlot");
}
var tileWidth = gpuSlot.Owner.TileSize;
var tileSize = tileWidth - (1 + GetBorder() * 2);
GPUTileStorage.GPUSlot parentGpuSlot = null;
var upsample = level > 0;
var parentTile = FindTile(level - 1, tx / 2, ty / 2, false, true);
if (upsample)
{
if (parentTile != null)
{
parentGpuSlot = parentTile.GetSlot(0) as GPUTileStorage.GPUSlot;
}
else
{
throw new MissingTileException("Find parent tile failed");
}
}
if (parentGpuSlot == null && upsample)
{
throw new NullReferenceException("parentGpuSlot");
}
var rootQuadSize = TerrainNode.TerrainQuadRoot.Length;
var tileWSD = Vector4.zero;
tileWSD.x = (float)tileWidth;
tileWSD.y = (float)rootQuadSize / (float)(1 << level) / (float)tileSize;
tileWSD.z = (float)tileSize / (float)(TerrainNode.Body.GridResolution - 1);
tileWSD.w = 0.0f;
UpSampleMaterial.SetVector(uniforms.tileWSD, tileWSD);
if (upsample)
{
var parentTexture = parentGpuSlot.Texture;
UpSampleMaterial.SetTexture(uniforms.coarseLevelSampler, parentTexture);
var dx = (float)(tx % 2) * (float)(tileSize / 2.0f);
var dy = (float)(ty % 2) * (float)(tileSize / 2.0f);
var coarseLevelOSL = new Vector4(dx / (float)parentTexture.width, dy / (float)parentTexture.height, 1.0f / (float)parentTexture.width, 0.0f);
UpSampleMaterial.SetVector(uniforms.coarseLevelOSL, coarseLevelOSL);
}
else
{
UpSampleMaterial.SetVector(uniforms.coarseLevelOSL, new Vector4(-1.0f, -1.0f, -1.0f, -1.0f));
}
UpSampleMaterial.SetTexture(uniforms.residualSampler, null);
UpSampleMaterial.SetVector(uniforms.residualOSH, new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
var rs = level < NoiseAmplitudes.Length ? NoiseAmplitudes[level] : 0.0f;
rs = rs / AmplitudeDiviner;
rs = -Math.Abs(rs);
var offset = Vector4d.Zero();
offset.x = ((double)tx / (1 << level) - 0.5) * rootQuadSize;
offset.y = ((double)ty / (1 << level) - 0.5) * rootQuadSize;
offset.z = rootQuadSize / (1 << level);
offset.w = TerrainNode.Body.Radius;
if (level == 0)
{
UpSampleMaterial.SetFloat(uniforms.frequency, UpsampleSettings.Freqeuncy * (1 << level));
}
var ltow = TerrainNode.FaceToLocal.ToMatrix4x4();
UpSampleMaterial.SetFloat(uniforms.amp, rs * UpsampleSettings.Amplitude);
UpSampleMaterial.SetVector(uniforms.offset, offset.ToVector4());
UpSampleMaterial.SetMatrix(uniforms.localToWorld, ltow);
Graphics.Blit(null, gpuSlot.Texture, UpSampleMaterial);
base.DoCreateTile(level, tx, ty, slot);
}