public void Generate(RenderTexture targetRt)
{
GNormalMapGeneratorParams param = GTextureToolParams.Instance.NormalMap;
Color defaultColor = param.Space == GNormalMapSpace.Local ? new Color(0.5f, 1, 0.5f, 1) : new Color(0.5f, 0.5f, 1, 1);
if (param.Terrain == null || param.Terrain.TerrainData == null)
{
GCommon.FillTexture(targetRt, defaultColor);
}
else
{
if (param.Mode == GNormalMapMode.Sharp)
{
RenderSharpNormalMap(param, targetRt);
}
else if (param.Mode == GNormalMapMode.Interpolated)
{
RenderInterpolatedNormalMap(param, targetRt);
}
else if (param.Mode == GNormalMapMode.PerPixel)
{
RenderPerPixelNormalMap(param, targetRt);
}
else
{
GCommon.FillTexture(targetRt, defaultColor);
}
}
}
public void RenderSharpNormalMap(GNormalMapGeneratorParams param, RenderTexture targetRt)
{
Material mat = GInternalMaterials.TerrainNormalMapRendererMaterial;
mat.SetInt("_TangentSpace", param.Space == GNormalMapSpace.Tangent ? 1 : 0);
mat.SetPass(0);
RenderTexture.active = targetRt;
GL.PushMatrix();
GL.LoadOrtho();
GL.Begin(GL.TRIANGLES);
GTerrainChunk[] chunks = param.Terrain.GetChunks();
for (int i = 0; i < chunks.Length; ++i)
{
Mesh m = chunks[i].MeshFilterComponent.sharedMesh;
if (m == null)
{
continue;
}
Vector2[] uvs = m.uv;
Vector3[] normals = m.normals;
for (int j = 0; j < uvs.Length; ++j)
{
GL.TexCoord(normals[j]);
GL.Vertex3(uvs[j].x, uvs[j].y, 0);
}
}
GL.End();
GL.PopMatrix();
RenderTexture.active = null;
}
public void RenderPerPixelNormalMap(GNormalMapGeneratorParams param, RenderTexture targetRt)
{
Material mat = GInternalMaterials.TerrainPerPixelNormalMapRendererMaterial;
mat.SetTexture("_HeightMap", param.Terrain.TerrainData.Geometry.HeightMap);
mat.SetFloat("_Width", param.Terrain.TerrainData.Geometry.Width);
mat.SetFloat("_Height", param.Terrain.TerrainData.Geometry.Height);
mat.SetFloat("_Length", param.Terrain.TerrainData.Geometry.Length);
mat.SetInt("_TangentSpace", param.Space == GNormalMapSpace.Tangent ? 1 : 0);
GCommon.DrawQuad(targetRt, GCommon.FullRectUvPoints, mat, 0);
}
private void DrawNormalMapParams()
{
GNormalMapGeneratorParams param = GTextureToolParams.Instance.NormalMap;
param.Terrain = EditorGUILayout.ObjectField("Terrain", param.Terrain, typeof(GStylizedTerrain), true) as GStylizedTerrain;
param.Mode = (GNormalMapMode)EditorGUILayout.EnumPopup("Mode", param.Mode);
param.Space = (GNormalMapSpace)EditorGUILayout.EnumPopup("Space", param.Space);
lockLivePreviewTerrain = true;
SetLivePreviewTerrain(param.Terrain);
GTextureToolParams.Instance.NormalMap = param;
}
public void Generate(RenderTexture targetRt)
{
GSteepnessMapGeneratorParams param = GTextureToolParams.Instance.Steepness;
if (param.Terrain == null || param.Terrain.TerrainData == null)
{
GCommon.FillTexture(targetRt, Color.clear);
}
else
{
GNormalMapGeneratorParams normalMapParam = new GNormalMapGeneratorParams();
normalMapParam.Terrain = param.Terrain;
normalMapParam.Space = GNormalMapSpace.Local;
normalMapParam.Mode = param.Mode;
RenderTexture normalMap = new RenderTexture(targetRt);
GNormalMapGenerator gen = new GNormalMapGenerator();
if (param.Mode == GNormalMapMode.Sharp)
{
gen.RenderSharpNormalMap(normalMapParam, normalMap);
}
else if (param.Mode == GNormalMapMode.Interpolated)
{
gen.RenderInterpolatedNormalMap(normalMapParam, normalMap);
}
else if (param.Mode == GNormalMapMode.PerPixel)
{
gen.RenderPerPixelNormalMap(normalMapParam, normalMap);
}
Mat.SetTexture("_BumpMap", normalMap);
GCommon.DrawQuad(targetRt, GCommon.FullRectUvPoints, Mat, 0);
normalMap.Release();
GUtilities.DestroyObject(normalMap);
}
}
public void RenderInterpolatedNormalMap(GNormalMapGeneratorParams param, RenderTexture targetRt)
{
List <Vector2> uvs = new List <Vector2>();
Dictionary <Vector2, Vector3> normals = new Dictionary <Vector2, Vector3>();
Dictionary <Vector2, int> normalsCount = new Dictionary <Vector2, int>();
GTerrainChunk[] chunks = param.Terrain.GetChunks();
for (int i = 0; i < chunks.Length; ++i)
{
Mesh m = chunks[i].MeshFilterComponent.sharedMesh;
if (m == null)
{
continue;
}
Vector2[] meshUv = m.uv;
Vector3[] meshNormal = m.normals;
for (int j = 0; j < meshUv.Length; ++j)
{
uvs.Add(meshUv[j]);
if (normals.ContainsKey(meshUv[j]))
{
normals[meshUv[j]] += meshNormal[j];
}
else
{
normals[meshUv[j]] = meshNormal[j];
}
if (normalsCount.ContainsKey(meshUv[j]))
{
normalsCount[meshUv[j]] += 1;
}
else
{
normalsCount[meshUv[j]] = 1;
}
}
}
List <Vector3> smoothNormals = new List <Vector3>();
for (int i = 0; i < uvs.Count; ++i)
{
smoothNormals.Add(normals[uvs[i]] / normalsCount[uvs[i]]);
}
Material mat = GInternalMaterials.TerrainNormalMapRendererMaterial;
mat.SetInt("_TangentSpace", param.Space == GNormalMapSpace.Tangent ? 1 : 0);
mat.SetPass(0);
RenderTexture.active = targetRt;
GL.PushMatrix();
GL.LoadOrtho();
GL.Begin(GL.TRIANGLES);
for (int i = 0; i < uvs.Count; ++i)
{
GL.TexCoord(smoothNormals[i]);
GL.Vertex3(uvs[i].x, uvs[i].y, 0);
}
GL.End();
GL.PopMatrix();
RenderTexture.active = null;
}
