public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
MaterialManager mgr = terrain.GetComponent <MaterialManager>();
if (mgr != null)
{
// IndexMap indexMap = mgr.GetIndexMap();
// RenderTexture rt= indexMap.GetTempRenderTexture(true);
paintInProgress = true;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext indexCtx = PaintContext.CreateFromBounds(terrain, brushXform.GetBrushXYBounds(), 64, 64, 1);
indexCtx.CreateRenderTargets(RenderTextureFormat.ARGB32);
PaintContext normalCtx = TerrainPaintUtility.CollectNormals(terrain, brushXform.GetBrushXYBounds(), 2);
Material blitMaterial = TerrainPaintUtility.GetBlitMaterial();
indexCtx.Gather(
TerrainToIndexMapTexture,
new Color(0.0f, 0.0f, 0.0f, 0.0f),
blitMaterial, 0,
null, // before
null); // after
// render source -> dest here
// RenderTexture.active = ctx.oldRenderTexture;
Material paintMaterial = GetPaintMaterial();
float brushStrength = Event.current.shift ? -editContext.brushStrength : editContext.brushStrength;
Vector4 brushParams = new Vector4(
brushStrength,
0.0f,
0.0f, 0.0f);
paintMaterial.SetTexture("_BrushTex", editContext.brushTexture);
paintMaterial.SetVector("_BrushParams", brushParams);
paintMaterial.SetFloat("materialIndex", materialIndex);
paintMaterial.SetTexture("_NormalMap", normalCtx.sourceRenderTexture);
Vector4 indexToNormalXform;
TerrainPaintUtility.BuildTransformPaintContextUVToPaintContextUV(
indexCtx,
normalCtx,
out indexToNormalXform);
paintMaterial.SetVector("_indexToNormalXform", indexToNormalXform);
Vector4 xformParams = new Vector4();
xformParams.x = (randomRotation ? minRotation : fixedRotation) / 360.0f;
xformParams.y = (randomRotation ? maxRotation : fixedRotation) / 360.0f;
paintMaterial.SetVector("_xformParams", xformParams);
Vector4 randoms = new Vector4(
UnityEngine.Random.Range(0.0f, 1.0f),
UnityEngine.Random.Range(0.0f, 1.0f),
UnityEngine.Random.Range(0.0f, 1.0f),
UnityEngine.Random.Range(0.0f, 1.0f));
paintMaterial.SetVector("_randoms", randoms);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(indexCtx, brushXform, paintMaterial);
Graphics.Blit(indexCtx.sourceRenderTexture, indexCtx.destinationRenderTexture, paintMaterial, 0);
// ctx.ScatterToTexture() // we should do this ... less temp render textures
// and users don't have to store render textures at all...
indexCtx.Scatter(
TerrainToIndexMapRenderTexture,
blitMaterial, 0,
null,
null);
normalCtx.Cleanup();
indexCtx.Cleanup();
}
/*
* BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
* PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedTerrainLayer);
* if (paintContext == null)
* return false;
*
* Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
*
* // apply brush
* float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
* Vector4 brushParams = new Vector4(editContext.brushStrength, targetAlpha, 0.0f, 0.0f);
* mat.SetTexture("_BrushTex", editContext.brushTexture);
* mat.SetVector("_BrushParams", brushParams);
*
* TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
*
* Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.PaintTexture);
*
* TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
*/
return(true);
}