private void Awake()
{
_mesh = new Mesh();
_vertices = new Vector3[4 * MAX_QUAD_AMOUNT];
_uv = new Vector2[4 * MAX_QUAD_AMOUNT];
_triangles = new int[6 * MAX_QUAD_AMOUNT];
_mesh.vertices = _vertices;
_mesh.uv = _uv;
_mesh.triangles = _triangles;
_mesh.bounds = new Bounds(Vector3.zero, Vector3.one * 10000f);
GetComponent <MeshFilter>().mesh = _mesh;
GetComponent <Renderer>().sortingOrder = -1;
// Set up internal UV Normalized Array
Material material = GetComponent <MeshRenderer>().material;
Texture mainTexture = material.mainTexture;
int textureWidth = mainTexture.width;
int textureHeight = mainTexture.height;
List <UvCoords> uvCoordsList = new List <UvCoords>();
foreach (ParticleUvPixels particleUvPixels in particleUvPixelsArray)
{
UvCoords uvCoords = new UvCoords {
uv00 = new Vector2((float)particleUvPixels.uv00Pixels.x / textureWidth, (float)particleUvPixels.uv00Pixels.y / textureHeight),
uv11 = new Vector2((float)particleUvPixels.uv11Pixels.x / textureWidth, (float)particleUvPixels.uv11Pixels.y / textureHeight),
};
uvCoordsList.Add(uvCoords);
}
_uvCoordsArray = uvCoordsList.ToArray();
}
public void UpdateQuad(int quadIndex, Vector3 position, float rotation, Vector3 quadSize, bool skewed, int uvIndex)
{
//Relocate vertices
int vIndex = quadIndex * 4;
int vIndex0 = vIndex;
int vIndex1 = vIndex + 1;
int vIndex2 = vIndex + 2;
int vIndex3 = vIndex + 3;
if (skewed)
{
_vertices[vIndex0] = position + Quaternion.Euler(0, 0, rotation) * new Vector3(-quadSize.x, -quadSize.y);
_vertices[vIndex1] = position + Quaternion.Euler(0, 0, rotation) * new Vector3(-quadSize.x, +quadSize.y);
_vertices[vIndex2] = position + Quaternion.Euler(0, 0, rotation) * new Vector3(+quadSize.x, +quadSize.y);
_vertices[vIndex3] = position + Quaternion.Euler(0, 0, rotation) * new Vector3(+quadSize.x, -quadSize.y);
}
else
{
_vertices[vIndex0] = position + Quaternion.Euler(0, 0, rotation - 180) * quadSize;
_vertices[vIndex1] = position + Quaternion.Euler(0, 0, rotation - 270) * quadSize;
_vertices[vIndex2] = position + Quaternion.Euler(0, 0, rotation - 0) * quadSize;
_vertices[vIndex3] = position + Quaternion.Euler(0, 0, rotation - 90) * quadSize;
}
// UV
UvCoords uvCoords = _uvCoordsArray[uvIndex];
_uv[vIndex0] = uvCoords.uv00;
_uv[vIndex1] = new Vector2(uvCoords.uv00.x, uvCoords.uv11.y);
_uv[vIndex2] = uvCoords.uv11;
_uv[vIndex3] = new Vector2(uvCoords.uv11.x, uvCoords.uv00.y);
//Create triangles
int tIndex = quadIndex * 6;
_triangles[tIndex + 0] = vIndex0;
_triangles[tIndex + 1] = vIndex1;
_triangles[tIndex + 2] = vIndex2;
_triangles[tIndex + 3] = vIndex0;
_triangles[tIndex + 4] = vIndex2;
_triangles[tIndex + 5] = vIndex3;
_updateVertices = true;
_updateUv = true;
_updateTriangles = true;
}
