public void Editor_DrawLivePreview(GStylizedTerrain terrain, GTexturePainterArgs args, Camera cam)
{
#if UNITY_EDITOR
Vector2[] uvCorners = new Vector2[args.WorldPointCorners.Length];
for (int i = 0; i < uvCorners.Length; ++i)
{
uvCorners[i] = terrain.WorldPointToUV(args.WorldPointCorners[i]);
}
Rect dirtyRect = GUtilities.GetRectContainsPoints(uvCorners);
if (!dirtyRect.Overlaps(new Rect(0, 0, 1, 1)))
{
return;
}
Texture2D bg = terrain.TerrainData.Mask.MaskMap;
int maskResolution = terrain.TerrainData.Mask.MaskMapResolution;
RenderTexture rt = GTerrainTexturePainter.Internal_GetRenderTexture(terrain, maskResolution);
GCommon.CopyToRT(bg, rt);
Material mat = GInternalMaterials.MaskPainterMaterial;
mat.SetTexture("_MainTex", bg);
SetupTextureGrid(terrain, mat);
mat.SetTexture("_Mask", args.BrushMask);
mat.SetFloat("_Opacity", args.Opacity);
GMaskPainterParams param = GTexturePainterCustomParams.Instance.Mask;
Vector4 channel;
if (param.Channel == GTextureChannel.R)
{
channel = new Vector4(1, 0, 0, 0);
}
else if (param.Channel == GTextureChannel.G)
{
channel = new Vector4(0, 1, 0, 0);
}
else if (param.Channel == GTextureChannel.B)
{
channel = new Vector4(0, 0, 1, 0);
}
else
{
channel = new Vector4(0, 0, 0, 1);
}
mat.SetVector("_Channel", channel);
int pass =
args.ActionType == GPainterActionType.Normal ? 0 :
args.ActionType == GPainterActionType.Negative ? 1 :
args.ActionType == GPainterActionType.Alternative ? 2 : 0;
GCommon.DrawQuad(rt, uvCorners, mat, pass);
GLivePreviewDrawer.DrawMask4ChannelsLivePreview(
terrain, cam,
rt,
GCommon.UnitRect);
#endif
}
private void DrawMask(Camera cam)
{
GCommon.ForEachTerrain(painter.GroupId, (t) =>
{
if (t.TerrainData == null)
{
return;
}
if (painter.ActivePainter is GMaskPainter)
{
GLivePreviewDrawer.DrawMask4ChannelsLivePreview(t, cam, t.TerrainData.Mask.MaskMap, GCommon.UnitRect);
}
else
{
GLivePreviewDrawer.DrawTerrainMask(t, cam);
}
});
}