public static Material GenerateBillboardMaterial(FoliageTypeSpeedTreeData speedTreeData)
{
Material billboardMaterialBatch;
// Try and retrieve it first
billboardMaterialBatch = speedTreeData.m_BillboardMaterial;
if (billboardMaterialBatch == null)
{
// Else create it
Shader billboardShader = Shader.Find("Critias/WindTree_Billboard");
billboardMaterialBatch = new Material(billboardShader);
speedTreeData.m_BillboardMaterial = billboardMaterialBatch;
}
// Set the material universal data
billboardMaterialBatch.SetTexture("_MainTex", speedTreeData.m_BillboardRenderer.sharedMaterial.GetTexture("_MainTex"));
billboardMaterialBatch.SetTexture("_BumpMap", speedTreeData.m_BillboardRenderer.sharedMaterial.GetTexture("_BumpMap"));
billboardMaterialBatch.SetColor("_HueVariation", speedTreeData.m_BillboardRenderer.sharedMaterial.GetColor("_HueVariation"));
billboardMaterialBatch.SetVector("_Size", speedTreeData.m_Size);
// Set the material UV data
billboardMaterialBatch.SetVectorArray("_UVVert_U", speedTreeData.m_VertBillboardU);
billboardMaterialBatch.SetVectorArray("_UVVert_V", speedTreeData.m_VertBillboardV);
billboardMaterialBatch.SetVector("_UVHorz_U", speedTreeData.m_VertBillboardU[0]);
billboardMaterialBatch.SetVector("_UVHorz_V", speedTreeData.m_VertBillboardV[0]);
billboardMaterialBatch.enableInstancing = true;
return(billboardMaterialBatch);
}
/** Called in case that we need to set the volatile data for a billboard batch material or something like that */
public void UpdateValues()
{
// Update all billboard distances
if (m_IsSpeedTreeType)
{
FoliageTypeSpeedTreeData speedTreeData = m_RuntimeData.m_SpeedTreeData;
Material billboardMaterialBatch = m_RuntimeData.m_SpeedTreeData.m_BillboardMaterial;
if (billboardMaterialBatch != null)
{
billboardMaterialBatch.SetFloat("CRITIAS_MaxFoliageTypeDistance", m_RenderInfo.m_MaxDistance);
billboardMaterialBatch.SetFloat("CRITIAS_MaxFoliageTypeDistanceSqr", m_RenderInfo.m_MaxDistance * m_RenderInfo.m_MaxDistance);
billboardMaterialBatch.SetVectorArray("_UVVert_U", speedTreeData.m_VertBillboardU);
billboardMaterialBatch.SetVectorArray("_UVVert_V", speedTreeData.m_VertBillboardV);
billboardMaterialBatch.SetVector("_UVHorz_U", speedTreeData.m_VertBillboardU[0]);
billboardMaterialBatch.SetVector("_UVHorz_V", speedTreeData.m_VertBillboardV[0]);
billboardMaterialBatch.SetColor("_HueVariation", m_RenderInfo.m_Hue);
billboardMaterialBatch.SetColor("_Color", m_RenderInfo.m_Color);
}
// Update the hue variation
if (m_IsGrassType)
{
m_RuntimeData.m_LODDataGrass.m_Material.SetColor("_HueVariation", m_RenderInfo.m_Hue);
m_RuntimeData.m_LODDataGrass.m_Material.SetColor("_Color", m_RenderInfo.m_Color);
}
else
{
for (int i = 0; i < m_RuntimeData.m_LODDataTree.Length; i++)
{
for (int m = 0; m < m_RuntimeData.m_LODDataTree[i].m_Materials.Length; m++)
{
m_RuntimeData.m_LODDataTree[i].m_Materials[m].SetColor("_Color", m_RenderInfo.m_Color);
}
}
}
}
// Update all LOD distances
if (IsGrassType == false)
{
LODGroup grp = m_Prefab.GetComponent <LODGroup>();
LOD[] lods = grp != null?grp.GetLODs() : null;
FoliageTypeUtilities.UpdateDistancesLOD(m_RuntimeData.m_LODDataTree, lods, m_RenderInfo.m_MaxDistance, IsSpeedTreeType);
}
}
public static void ExtractBillboardData(BillboardRenderer billboardData, FoliageTypeSpeedTreeData data)
{
BillboardAsset billAsset = billboardData.billboard;
Vector4 size = new Vector4(billAsset.width, billAsset.height, billAsset.bottom, 1);
// UV Extraction
Vector4[] uvs = billAsset.GetImageTexCoords();
Vector2[] vertBillUV = new Vector2[uvs.Length * 4];
Vector2[] horzBillUV = new Vector2[4];
// Build the UV's
for (int uvIdx = 0, billUv = 0; uvIdx < uvs.Length; uvIdx++, billUv += 4)
{
Vector4 extract = uvs[uvIdx];
if (uvIdx == 0)
{
horzBillUV[0] = new Vector2(extract.x, extract.y);
horzBillUV[1] = new Vector2(extract.x, extract.y) + new Vector2(0, Mathf.Abs(extract.w));
horzBillUV[2] = new Vector2(extract.x, extract.y) + new Vector2(-extract.z, Mathf.Abs(extract.w));
horzBillUV[3] = new Vector2(extract.x, extract.y) + new Vector2(-extract.z, 0);
}
// We are rotated
if (extract.w < 0)
{
vertBillUV[billUv + 0] = new Vector2(extract.x, extract.y);
vertBillUV[billUv + 1] = new Vector2(extract.x, extract.y) + new Vector2(0, Mathf.Abs(extract.w));
vertBillUV[billUv + 2] = new Vector2(extract.x, extract.y) + new Vector2(-extract.z, Mathf.Abs(extract.w));
vertBillUV[billUv + 3] = new Vector2(extract.x, extract.y) + new Vector2(-extract.z, 0);
}
else
{
vertBillUV[billUv + 0] = new Vector2(extract.x, extract.y);
vertBillUV[billUv + 1] = new Vector2(extract.x, extract.y) + new Vector2(extract.z, 0);
vertBillUV[billUv + 2] = new Vector2(extract.x, extract.y) + new Vector2(extract.z, extract.w);
vertBillUV[billUv + 3] = new Vector2(extract.x, extract.y) + new Vector2(0, extract.w);
}
}
// Build the UVs ready for the shader
Vector4[] UV_U = new Vector4[8];
Vector4[] UV_V = new Vector4[8];
Vector2[] uv = vertBillUV;
for (int i = 0; i < 8; i++)
{
// 4 by 4 elements
UV_U[i].x = uv[4 * i + 0].x;
UV_U[i].y = uv[4 * i + 1].x;
UV_U[i].z = uv[4 * i + 2].x;
UV_U[i].w = uv[4 * i + 3].x;
UV_V[i].x = uv[4 * i + 0].y;
UV_V[i].y = uv[4 * i + 1].y;
UV_V[i].z = uv[4 * i + 2].y;
UV_V[i].w = uv[4 * i + 3].y;
}
// Assign the data
data.m_Size = size;
data.m_VertBillboardU = UV_U;
data.m_VertBillboardV = UV_V;
data.m_BillboardRenderer = billboardData;
data.m_BillboardMaterial = GenerateBillboardMaterial(data);
}