void DrawParticles(ObiActor actor)
{
using (m_DrawParticlesPerfMarker.Auto())
{
if (mesh == null || material == null || !render || !isActiveAndEnabled || !actor.isActiveAndEnabled || actor.solver == null)
{
return;
}
ObiSolver solver = actor.solver;
// figure out the size of our instance batches:
meshesPerBatch = Constants.maxInstancesPerBatch;
batchCount = actor.particleCount / meshesPerBatch + 1;
meshesPerBatch = Mathf.Min(meshesPerBatch, actor.particleCount);
Vector4 basis1 = new Vector4(1, 0, 0, 0);
Vector4 basis2 = new Vector4(0, 1, 0, 0);
Vector4 basis3 = new Vector4(0, 0, 1, 0);
//Convert particle data to mesh instances:
for (int i = 0; i < batchCount; i++)
{
matrices.Clear();
colors.Clear();
mpb = new MaterialPropertyBlock();
int limit = Mathf.Min((i + 1) * meshesPerBatch, actor.activeParticleCount);
for (int j = i * meshesPerBatch; j < limit; ++j)
{
int solverIndex = actor.solverIndices[j];
actor.GetParticleAnisotropy(solverIndex, ref basis1, ref basis2, ref basis3);
matrices.Add(Matrix4x4.TRS(actor.GetParticlePosition(solverIndex),
actor.GetParticleOrientation(solverIndex),
Vector3.Scale(new Vector3(basis1[3], basis2[3], basis3[3]), instanceScale)));
colors.Add(actor.GetParticleColor(solverIndex));
}
if (colors.Count > 0)
mpb.SetVectorArray("_Color", colors);
// Send the meshes to be drawn:
Graphics.DrawMeshInstanced(mesh, 0, material, matrices, mpb);
}
}
}
void ScenePreCull(Camera cam)
{
if (mesh == null || material == null || !render || !isActiveAndEnabled || !actor.isActiveAndEnabled || !actor.Initialized)
{
return;
}
ObiSolver solver = actor.Solver;
// figure out the size of our instance batches:
meshesPerBatch = Constants.maxInstancesPerBatch;
batchCount = actor.positions.Length / meshesPerBatch + 1;
meshesPerBatch = Mathf.Min(meshesPerBatch, actor.positions.Length);
Vector4 basis1;
Vector4 basis2;
Vector4 basis3;
//Convert particle data to mesh instances:
for (int i = 0; i < batchCount; i++)
{
matrices.Clear();
colors.Clear();
mpb = new MaterialPropertyBlock();
int limit = Mathf.Min((i + 1) * meshesPerBatch, actor.active.Length);
for (int j = i * meshesPerBatch; j < limit; ++j)
{
if (actor.active[j])
{
actor.GetParticleAnisotropy(j, out basis1, out basis2, out basis3);
matrices.Add(Matrix4x4.TRS(actor.GetParticlePosition(j),
actor.GetParticleOrientation(j),
Vector3.Scale(new Vector3(basis1[3], basis2[3], basis3[3]), instanceScale)));
colors.Add((actor.colors != null && j < actor.colors.Length) ? actor.colors[j] : Color.white);
}
}
if (colors.Count > 0)
{
mpb.SetVectorArray("_Color", colors);
}
// Send the meshes to be drawn:
Graphics.DrawMeshInstanced(mesh, 0, material, matrices, mpb);
}
}
void ScenePreCull(Camera cam)
{
if (!isActiveAndEnabled || !actor.isActiveAndEnabled || !actor.Initialized)
{
ClearMeshes();
return;
}
CreateMaterialIfNeeded();
ObiSolver solver = actor.Solver;
// figure out the size of our drawcall arrays:
particlesPerDrawcall = Constants.maxVertsPerMesh / 4;
drawcallCount = actor.positions.Length / particlesPerDrawcall + 1;
particlesPerDrawcall = Mathf.Min(particlesPerDrawcall, actor.positions.Length);
// If the amount of meshes we need to draw the particles has changed:
if (drawcallCount != meshes.Count)
{
// Re-generate meshes:
ClearMeshes();
for (int i = 0; i < drawcallCount; i++)
{
Mesh mesh = new Mesh();
mesh.name = "Particle imposters";
mesh.hideFlags = HideFlags.HideAndDontSave;
mesh.MarkDynamic();
meshes.Add(mesh);
}
}
Vector3 position;
Vector4 basis1;
Vector4 basis2;
Vector4 basis3;
Color color;
//Convert particle data to mesh geometry:
for (int i = 0; i < drawcallCount; i++)
{
// Clear all arrays
vertices.Clear();
normals.Clear();
colors.Clear();
triangles.Clear();
anisotropy1.Clear();
anisotropy2.Clear();
anisotropy3.Clear();
int index = 0;
int limit = Mathf.Min((i + 1) * particlesPerDrawcall, actor.active.Length);
for (int j = i * particlesPerDrawcall; j < limit; ++j)
{
if (actor.active[j])
{
position = actor.GetParticlePosition(j);
actor.GetParticleAnisotropy(j, out basis1, out basis2, out basis3);
color = (actor.colors != null && j < actor.colors.Length) ? actor.colors[j] : Color.white;
vertices.Add(position);
vertices.Add(position);
vertices.Add(position);
vertices.Add(position);
normals.Add(particleOffset0);
normals.Add(particleOffset1);
normals.Add(particleOffset2);
normals.Add(particleOffset3);
colors.Add(color);
colors.Add(color);
colors.Add(color);
colors.Add(color);
anisotropy1.Add(basis1);
anisotropy1.Add(basis1);
anisotropy1.Add(basis1);
anisotropy1.Add(basis1);
anisotropy2.Add(basis2);
anisotropy2.Add(basis2);
anisotropy2.Add(basis2);
anisotropy2.Add(basis2);
anisotropy3.Add(basis3);
anisotropy3.Add(basis3);
anisotropy3.Add(basis3);
anisotropy3.Add(basis3);
triangles.Add(index + 2);
triangles.Add(index + 1);
triangles.Add(index);
triangles.Add(index + 3);
triangles.Add(index + 2);
triangles.Add(index);
index += 4;
}
}
Apply(meshes[i]);
}
DrawParticles();
}
