public Mesh meshForDisplay()
{
// we need at least 2 divisions
if( divisions < 2 )
divisions = 2;
_quadSlices = new QuadSlice[divisions];
var mesh = new Mesh();
// figure out how many verts and triangles we need
var vertsPerRow = divisions * 2;
var numTriangles = divisions * 6; // 2 tris per division slice with 3 verts each
var numVertices = vertsPerRow * 2; // top and bottom rows
var verts = new Vector3[numVertices];
var uvs = new Vector2[numVertices];
var tris = new int[numTriangles];
// so, our verts need to go from -halfWidth to halfWidth and -halfHeight to halfHeight
var halfHeight = 5f; // 5 is the camera.orthoSize which is half the screen height
var halfWidth = halfHeight * ( (float)Screen.width / (float)Screen.height );
var width = halfWidth * 2f;
var divisionWidth = ( 1.0f / divisions ) * width;
var divisionWidthFraction = divisionWidth / width; // width of a slice normalized from 0 to 1 for uv generation
// create our verts, tris and uvs
var index = 0;
var triIndex = 0;
for( var i = 0; i < divisions; i++ )
{
var rootVertIndex = i * 4; // first vert index in each loop iteration
var xMin = i * divisionWidth - halfWidth;
var xMax = xMin + divisionWidth;
var uvMin = i * divisionWidthFraction;
var uvMax = uvMin + divisionWidthFraction;
verts[index++] = new Vector3( xMin, -halfHeight, 0 );
verts[index++] = new Vector3( xMin, halfHeight, 0 );
verts[index++] = new Vector3( xMax, -halfHeight, 0 );
verts[index++] = new Vector3( xMax, halfHeight, 0 );
tris[triIndex++] = 0 + rootVertIndex;
tris[triIndex++] = 1 + rootVertIndex;
tris[triIndex++] = 2 + rootVertIndex;
tris[triIndex++] = 3 + rootVertIndex;
tris[triIndex++] = 2 + rootVertIndex;
tris[triIndex++] = 1 + rootVertIndex;
uvs[rootVertIndex + 0] = new Vector2( uvMin, 0 );
uvs[rootVertIndex + 1] = new Vector2( uvMin, 1 );
uvs[rootVertIndex + 2] = new Vector2( uvMax, 0 );
uvs[rootVertIndex + 3] = new Vector2( uvMax, 1 );
_quadSlices[i] = new QuadSlice( rootVertIndex, verts );
}
mesh.vertices = verts;
mesh.uv = uvs;
mesh.triangles = tris;
return mesh;
}
public Mesh meshForDisplay()
{
// we need at least 2 divisions
if (divisions < 2)
{
divisions = 2;
}
_quadSlices = new QuadSlice[divisions];
var mesh = new Mesh();
// figure out how many verts and triangles we need
var vertsPerRow = divisions * 2;
var numTriangles = divisions * 6; // 2 tris per division slice with 3 verts each
var numVertices = vertsPerRow * 2; // top and bottom rows
var verts = new Vector3[numVertices];
var uvs = new Vector2[numVertices];
var tris = new int[numTriangles];
// so, our verts need to go from -halfWidth to halfWidth and -halfHeight to halfHeight
var halfHeight = 5f; // 5 is the camera.orthoSize which is half the screen height
var halfWidth = halfHeight * ((float)Screen.width / (float)Screen.height);
var width = halfWidth * 2f;
var divisionWidth = (1.0f / divisions) * width;
var divisionWidthFraction = divisionWidth / width; // width of a slice normalized from 0 to 1 for uv generation
// create our verts, tris and uvs
var index = 0;
var triIndex = 0;
for (var i = 0; i < divisions; i++)
{
var rootVertIndex = i * 4; // first vert index in each loop iteration
var xMin = i * divisionWidth - halfWidth;
var xMax = xMin + divisionWidth;
var uvMin = i * divisionWidthFraction;
var uvMax = uvMin + divisionWidthFraction;
verts[index++] = new Vector3(xMin, -halfHeight, 0);
verts[index++] = new Vector3(xMin, halfHeight, 0);
verts[index++] = new Vector3(xMax, -halfHeight, 0);
verts[index++] = new Vector3(xMax, halfHeight, 0);
tris[triIndex++] = 0 + rootVertIndex;
tris[triIndex++] = 1 + rootVertIndex;
tris[triIndex++] = 2 + rootVertIndex;
tris[triIndex++] = 3 + rootVertIndex;
tris[triIndex++] = 2 + rootVertIndex;
tris[triIndex++] = 1 + rootVertIndex;
uvs[rootVertIndex + 0] = new Vector2(uvMin, 0);
uvs[rootVertIndex + 1] = new Vector2(uvMin, 1);
uvs[rootVertIndex + 2] = new Vector2(uvMax, 0);
uvs[rootVertIndex + 3] = new Vector2(uvMax, 1);
_quadSlices[i] = new QuadSlice(rootVertIndex, verts);
}
mesh.vertices = verts;
mesh.uv = uvs;
mesh.triangles = tris;
return(mesh);
}
