public static int GetTrianglesForShape(RenderShape renderShape, RenderProjection projection)
{
// Tris is the number of triangles in each shape
int tris = 0;
switch (renderShape)
{
case RenderShape.Cube:
tris = 12;
break;
case RenderShape.Arrow:
tris = (projection == RenderProjection.FirstPerson) ? 2 : 3;
break;
case RenderShape.Square:
tris = 2;
break;
case RenderShape.Triangle:
tris = 1;
break;
case RenderShape.PointToPoint:
tris = 4;
break;
}
return(tris);
}
public static int GetVecticesForShape(RenderShape renderShape, RenderProjection projection)
{
// Verts is the number of UNIQUE vertices in each shape
int verts = 0;
switch (renderShape)
{
case RenderShape.Cube:
verts = 8;
break;
case RenderShape.Arrow:
verts = (projection == RenderProjection.FirstPerson) ? 4 : 7;
break;
case RenderShape.Square:
verts = 4;
break;
case RenderShape.Triangle:
verts = 3;
break;
case RenderShape.PointToPoint:
verts = 8;
break;
}
return(verts);
}
public void UpdateProjection(RenderProjection projection)
{
if (projection != m_Projection)
{
m_Projection = projection;
m_RenderState = k_BeginRenderer;
}
}
//Generate an arrow mesh procedurally
public static int[] AddArrowTrisToMesh(int offset, RenderProjection projection)
{
if (projection == RenderProjection.FirstPerson)
{
return(AddSquareTrisToMesh(offset));
}
var tris = new int[]
{
0, 1, 5, // left
6, 0, 5, //right
3, 4, 2 // head
};
for (int a = 0; a < tris.Length; a++)
{
tris[a] += offset;
}
return(tris);
}
public void UpdateProjection(RenderProjection projection)
{
//TODO
}
public static Vector3[] AddArrowVectorsToMesh(float m_ParticleSize, Vector3 position, Vector3 rotation, RenderProjection projection)
{
float stemLength = 5f * m_ParticleSize;
if (projection == RenderProjection.FirstPerson)
{
Quaternion q1 = Quaternion.Euler(rotation);
Matrix4x4 m1 = Matrix4x4.TRS(position, q1, Vector3.one);
Vector3 projectedPosition = m1.MultiplyPoint3x4(new Vector3(0f, 0f, m_ParticleSize * (stemLength + 1f)));
return(AddDiamondVectorsToMesh(m_ParticleSize, RenderDirection.Billboard, projectedPosition, position));
}
float thirdP = m_ParticleSize / 3f;
var p0 = new Vector3(-thirdP, 0f, 0f);
var p1 = new Vector3(-thirdP, 0f, m_ParticleSize * stemLength);
var p2 = new Vector3(-m_ParticleSize, 0f, m_ParticleSize * stemLength);
var p3 = new Vector3(0f, 0f, m_ParticleSize * (stemLength + 1f));
var p4 = new Vector3(m_ParticleSize, 0f, m_ParticleSize * stemLength);
var p5 = new Vector3(thirdP, 0f, m_ParticleSize * stemLength);
var p6 = new Vector3(thirdP, 0f, 0f);
var v = new Vector3[] { p0, p1, p2, p3, p4, p5, p6 };
Quaternion q = Quaternion.Euler(rotation);
Matrix4x4 m = Matrix4x4.TRS(position, q, Vector3.one);
for (int a = 0; a < v.Length; a++)
{
v[a] = m.MultiplyPoint3x4(v[a]);
}
return(v);
}