public void DrawBiomePreview()
{
if (m_drawPreview)
{
//Set up a multi-terrain operation once, all rules can then draw from the data collected here
Terrain currentTerrain = GetCurrentTerrain();
if (currentTerrain == null)
{
return;
}
GaiaMultiTerrainOperation operation = new GaiaMultiTerrainOperation(currentTerrain, transform, m_settings.m_range * 2f);
operation.GetHeightmap();
//only re-generate all textures etc. if settings have changed and the preview is dirty, otherwise we can just use the cached textures
if (m_biomePreviewDirty == true)
{
//Get additional op data (required for certain image masks)
operation.GetNormalmap();
operation.CollectTerrainBakedMasks();
//Clear texture cache first
if (m_cachedPreviewRT != null)
{
m_cachedPreviewRT.Release();
DestroyImmediate(m_cachedPreviewRT);
}
m_cachedPreviewRT = new RenderTexture(operation.RTheightmap);
RenderTexture currentRT = RenderTexture.active;
RenderTexture.active = m_cachedPreviewRT;
GL.Clear(true, true, Color.black);
RenderTexture.active = currentRT;
Graphics.Blit(ApplyBrush(operation), m_cachedPreviewRT);
RenderTexture.active = currentRT;
//Everything processed, preview not dirty anymore
m_biomePreviewDirty = false;
}
//Now draw the preview according to the cached textures
Material material = GaiaMultiTerrainOperation.GetDefaultGaiaSpawnerPreviewMaterial();
material.SetInt("_zTestMode", (int)UnityEngine.Rendering.CompareFunction.Always);
//assign the first color texture in the material
material.SetTexture("_colorTexture0", m_cachedPreviewRT);
//remove all other potential color textures, there can be caching issues if other visualisers were used in the meantime
for (int colorIndex = 1; colorIndex < GaiaConstants.maxPreviewedTextures; colorIndex++)
{
material.SetTexture("_colorTexture" + colorIndex, null);
}
//set the color
material.SetColor("_previewColor0", m_settings.m_visualisationColor);
Color seaLevelColor = GaiaSettings.m_stamperSeaLevelTintColor;
if (!m_showSeaLevelinPreview)
{
seaLevelColor.a = 0f;
}
material.SetColor("_seaLevelTintColor", seaLevelColor);
material.SetFloat("_seaLevel", SessionManager.m_session.m_seaLevel);
operation.Visualize(MultiTerrainOperationType.Heightmap, operation.RTheightmap, material, 1);
//Clean up
operation.CloseOperation();
//Clean up temp textures
GaiaUtils.ReleaseAllTempRenderTextures();
}
}