public void RenderMesh()
{
#region Heightmap Backup
{
// create heightmap backup
if (!heightMapBackupRt)
{
CreateHeightMapBackup();
}
// heightmap backup debug view
Graphics.Blit(heightMapBackupRt, m_rtCollection[RenderTextureIDs.heightMapOriginal], new Vector2(1f, 1f), new Vector2(0f, 0f));
}
#endregion Heightmap Backup
#region Mesh Projection
{
Projector projector = CreateProjector();
{
// ensure the render matrix will be the dimensions of the render texture
projector.PushTargetTexture();
{
projector.camera.targetTexture = m_rtCollection[RenderTextureIDs.cameraDepthRT].RT;
RenderTexture prevRT = RenderTexture.active;
{
// change camera, otherwise scene view camera would be used
Camera prevCamera = Camera.current;
Camera.SetupCurrent(projector.camera);
{
RenderTexture rt = m_rtCollection[RenderTextureIDs.cameraDepthRT].RT;
Graphics.SetRenderTarget(rt);
GL.Viewport(new Rect(0, 0, rt.width, rt.height));
GL.Clear(true, true, projector.camera.backgroundColor, 1f);
GL.PushMatrix();
{
GL.LoadProjectionMatrix(projector.camera.projectionMatrix);
GL.PushMatrix();
{
RenderGameObjectNow(gameObject, (int)0);
}
GL.PopMatrix();
}
GL.PopMatrix(); // restore matrix
Graphics.ClearRandomWriteTargets();
}
Camera.SetupCurrent(prevCamera);
}
// Calling SetRenderTarget with just a RenderTexture argument is the same as setting RenderTexture.active property.
// https://docs.unity3d.com/ScriptReference/Graphics.SetRenderTarget.html
RenderTexture.active = prevRT;
}
projector.PopTargetTexture();
Graphics.Blit(m_rtCollection[RenderTextureIDs.cameraDepthRT], m_rtCollection[RenderTextureIDs.meshHeight]);
}
#region Perspective correction
if (settings.direction == Direction.BottomUp)
{
ConvertBottomUpToTopDown(m_rtCollection[RenderTextureIDs.meshHeight], m_rtCollection[RenderTextureIDs.meshHeight], projector, gameObject);
}
#endregion Perspective correction
ReleaseProjector(projector);
}
#endregion Mesh Projection
#region Effects
{
if (settings.blur)
{
ApplyBlur(m_rtCollection[RenderTextureIDs.meshHeight], m_rtCollection[RenderTextureIDs.meshHeight]);
}
}
#endregion Effects
#region Create Heightmap
{
RenderTexture prev = RenderTexture.active;
{
RenderTexture.active = m_rtCollection[RenderTextureIDs.combinedHeightMap];
Material mat = GetBlendMaterial();
mat.SetTexture("_BlendTex", m_rtCollection[RenderTextureIDs.meshHeight]);
mat.SetInt("_BlendMode", (int)settings.blendMode);
mat.SetFloat("_Blend", settings.valueBlend);
Graphics.Blit(m_rtCollection[RenderTextureIDs.heightMapOriginal], m_rtCollection[RenderTextureIDs.combinedHeightMap], mat);
if (settings.featureEnabled)
{
ToolboxHelper.CopyTextureToTerrainHeight(
settings.terrain.terrainData,
m_rtCollection[RenderTextureIDs.combinedHeightMap],
new Vector2Int(0, 0),
m_rtCollection[RenderTextureIDs.combinedHeightMap].RT.width,
1,
0f,
1f);
}
}
RenderTexture.active = prev;
}
#endregion Create Heightmap
#region Debug View
{
if (settings.debug)
{
Graphics.Blit(settings.terrain.terrainData.heightmapTexture, m_rtCollection[RenderTextureIDs.heightMapCurrent]);
}
}
#endregion Debug View
}