public static void ComputeParticleMesh(RedGrassInstance[] grass_array, int count)
{
s_Output.Reset();
// Billboard grasses
for (int i = 0; i < count; ++i)
{
RedGrassInstance vgi = grass_array[i];
int a = i * 4;
int b = a + 1;
int c = a + 2;
int d = a + 3;
s_Output.Norms[d] =
s_Output.Norms[c] =
s_Output.Norms[b] =
s_Output.Norms[a] = vgi.RandPos(0);
Vector3 n = vgi.Normal;
s_Output.UVs[d] =
s_Output.UVs[c] =
s_Output.UVs[b] =
s_Output.UVs[a] = new Vector2(n.x, n.z);
s_Output.UV2s[d] =
s_Output.UV2s[c] =
s_Output.UV2s[b] =
s_Output.UV2s[a] = new Vector2((float)(vgi.Prototype) / (float)(RGPrototypeMgr.s_PrototypeCount), 0);
s_Output.Color32s[d] =
s_Output.Color32s[c] =
s_Output.Color32s[b] =
s_Output.Color32s[a] = Color.white;
}
s_Output.BillboardCount = count;
s_Output.TriquadCount = 0;
s_Output.TotalVertCount = count * 4;
}
/// <summary>
/// Computes the mesh elements info the output
/// </summary>
/// <param name='grass_list'>
/// Grass list.
/// </param>
/// <param name='density'>
/// Global Density.
/// </param>
public static void ComputeMesh(List <RedGrassInstance> grass_list, List <RedGrassInstance> tri_grass_list, float density)
{
try
{
s_Output.Reset();
int grass_cnt = 0;
int tri_grass_cnt = 0;
if (grass_list != null)
{
grass_cnt = grass_list.Count;
}
if (tri_grass_list != null)
{
tri_grass_cnt = tri_grass_list.Count;
}
Vector3 up = Vector3.up;
int quad = 0;
float _2pi = Mathf.PI * 2;
float _page_interval = _2pi / 3;
float angle_randomness = 0.3f;
// Billboard grasses
for (int i = 0; i < grass_cnt; ++i)
{
RedGrassInstance vgi = grass_list[i];
int randcnt = RandomCount(s_FullDensity * vgi.Density * density, vgi);
for (int q = 0; q < randcnt; ++q)
{
int a = quad * 4;
int b = a + 1;
int c = a + 2;
int d = a + 3;
s_Output.Norms[d] =
s_Output.Norms[c] =
s_Output.Norms[b] =
s_Output.Norms[a] = vgi.RandPos(q);
Vector3 n = vgi.Normal;
Vector3 n1 = (n * 1.25f - up * 0.25f).normalized;
Vector3 n2 = (n * 0.5f + up * 0.5f).normalized;
s_Output.UVs[a] = new Vector2(n1.x, n1.z);
s_Output.UVs[c] =
s_Output.UVs[b] = new Vector2(n2.x, n2.z);
s_Output.UVs[d] = s_Output.UVs[a];
s_Output.UV2s[d] =
s_Output.UV2s[c] =
s_Output.UV2s[b] =
s_Output.UV2s[a] = new Vector2((float)(vgi.Prototype) / (float)(RGPrototypeMgr.s_PrototypeCount), 0);
s_Output.Color32s[d] =
s_Output.Color32s[c] =
s_Output.Color32s[b] =
s_Output.Color32s[a] = vgi.ColorDw;
quad++;
}
}
s_Output.BillboardCount = quad;
// Tri-quad grasses
for (int i = 0; i < tri_grass_cnt; ++i)
{
RedGrassInstance vgi = tri_grass_list[i];
int randcnt = RandomCount(s_FullDensity * vgi.Density * density * 0.333f, vgi);
for (int t = 0; t < randcnt; ++t)
{
float phase = (float)(vgi.RandAttr.x) * _2pi;
Vector3 randpos = vgi.RandPos(t);
for (int page = 0; page < 3; ++page)
{
int a = quad * 4;
int b = a + 1;
int c = a + 2;
int d = a + 3;
s_Output.Norms[d] =
s_Output.Norms[c] =
s_Output.Norms[b] =
s_Output.Norms[a] = randpos;
Vector3 n = vgi.Normal;
Vector3 n1 = (n * 1.1f - up * 0.1f).normalized;
Vector3 n2 = (n * 0.5f + up * 0.5f).normalized;
s_Output.UVs[a] = new Vector2(n1.x, n1.z);
s_Output.UVs[c] =
s_Output.UVs[b] = new Vector2(n2.x, n2.z);
s_Output.UVs[d] = s_Output.UVs[a];
s_Output.UV2s[d] =
s_Output.UV2s[c] =
s_Output.UV2s[b] =
s_Output.UV2s[a] = new Vector2((float)(vgi.Prototype - 64) / (float)(RGPrototypeMgr.s_PrototypeCount),
page * _page_interval + phase + ((float)(vgi.RandAttrs(page + 1).x) - 0.5f) * angle_randomness);
s_Output.Color32s[d] =
s_Output.Color32s[c] =
s_Output.Color32s[b] =
s_Output.Color32s[a] = vgi.ColorDw;
quad++;
}
}
}
s_Output.TriquadCount = quad - s_Output.BillboardCount;
s_Output.TotalVertCount = quad * 4;
}
catch
{
Debug.Log("-----------------------------Grass Thread error");
}
}
