public SSMeshOBJSubsetData(SSVertex_PosNormTex[] vertices,
UInt16[] indices, UInt16[] wireframeIndices)
{
SSVertexBuffer <SSVertex_PosNormTex> vbo
= new SSVertexBuffer <SSVertex_PosNormTex>(vertices, BufferUsageHint.StaticDraw);
SSIndexBuffer triIbo = new SSIndexBuffer(indices, vbo, BufferUsageHint.StaticDraw);
SSIndexBuffer wireframeIbo = new SSIndexBuffer(wireframeIndices, vbo, BufferUsageHint.StaticDraw);
this.triangleMesh = new SSIndexedMesh <SSVertex_PosNormTex>(vbo, triIbo);
this.wireframeMesh = new SSIndexedMesh <SSVertex_PosNormTex>(vbo, wireframeIbo);
}
public SSIndexedMesh(SSVertexBuffer <V> vbo, SSIndexBuffer ibo)
{
if (vbo == null)
{
_vbo = new SSVertexBuffer <V> (BufferUsageHint.DynamicDraw);
}
else
{
_vbo = vbo;
}
if (ibo == null)
{
_ibo = new SSIndexBuffer(vbo, BufferUsageHint.DynamicDraw);
}
else
{
_ibo = ibo;
}
}
/// <summary>
/// Initialize given arrays of vertices and/or indices.
/// </summary>
public SSIndexedMesh(V[] vertices, UInt16[] indices)
: base()
{
if (vertices == null)
{
_vbo = new SSVertexBuffer <V> (BufferUsageHint.DynamicDraw);
}
else
{
_vbo = new SSVertexBuffer <V> (vertices);
}
if (indices == null)
{
_ibo = new SSIndexBuffer(_vbo, BufferUsageHint.DynamicDraw);
}
else
{
_ibo = new SSIndexBuffer(indices, _vbo);
}
}
/// <summary>
/// Initialize based on buffer usage. Default to dynamic draw.
/// </summary>
public SSIndexedMesh(BufferUsageHint vertUsage = BufferUsageHint.DynamicDraw,
BufferUsageHint indexUsage = BufferUsageHint.DynamicDraw)
{
_vbo = new SSVertexBuffer <V> (vertUsage);
_ibo = new SSIndexBuffer(_vbo, indexUsage);
}
public SSIndexedMeshTrianglesBVH(SSVertexBuffer <V> vbo, SSIndexBuffer ibo, int maxTrianglesPerLeaf = 1)
: base(new SSIndexedMeshTriangleBVHNodeAdaptor(vbo, ibo), new List <UInt16>(), maxTrianglesPerLeaf)
{
}
public SSIndexedMeshTriangleBVHNodeAdaptor(SSVertexBuffer <V> vbo, SSIndexBuffer ibo)
{
_vbo = vbo;
_ibo = ibo;
}
private void _Create(int divisions)
{
var icoSphereCreator = new IcoSphereCreator();
geom = icoSphereCreator.Create(divisions);
var positions = geom.Positions.ToArray();
var vertexSoup = new Util3d.VertexSoup <SSVertex_PosNormDiffTex1>();
var indexList = new List <UInt16>();
// we have to process each face in the IcoSphere, so we can
// properly "wrap" the texture-coordinates that fall across the left/right border
foreach (TriangleIndices face in geom.Faces)
{
var vp1 = positions[face.v1];
var vp2 = positions[face.v2];
var vp3 = positions[face.v3];
var normal1 = vp1.Normalized();
var normal2 = vp2.Normalized();
var normal3 = vp3.Normalized();
float s1, s2, s3, t1, t2, t3;
_computeEquirectangularUVForSpherePoint(normal1, out s1, out t1);
_computeEquirectangularUVForSpherePoint(normal2, out s2, out t2);
_computeEquirectangularUVForSpherePoint(normal3, out s3, out t3);
// configure verticies
var v1 = new SSVertex_PosNormDiffTex1();
v1.Position = vp1;
v1.Normal = normal1;
v1.Tu = s1;
v1.Tv = t1;
var v2 = new SSVertex_PosNormDiffTex1();
v2.Position = vp2;
v2.Normal = normal2;
v2.Tu = s2;
v2.Tv = t2;
var v3 = new SSVertex_PosNormDiffTex1();
v3.Position = vp3;
v3.Normal = normal3;
v3.Tu = s3;
v3.Tv = t3;
// if a triangle spans the left/right seam where U transitions from 1 to -1
bool v1_left = vp1.X < 0.0f;
bool v2_left = vp2.X < 0.0f;
bool v3_left = vp3.X < 0.0f;
if (vp1.Z < 0.0f && vp2.Z < 0.0f && vp3.Z < 0.0f &&
((v2_left != v1_left) || (v3_left != v1_left)))
{
// we need to "wrap" texture coordinates
if (v1.Tu < 0.5f)
{
v1.Tu += 1.0f;
}
if (v2.Tu < 0.5f)
{
v2.Tu += 1.0f;
}
if (v3.Tu < 0.5f)
{
v3.Tu += 1.0f;
}
}
// add configured verticies to mesh..
UInt16 idx1 = vertexSoup.digestVertex(ref v1);
UInt16 idx2 = vertexSoup.digestVertex(ref v2);
UInt16 idx3 = vertexSoup.digestVertex(ref v3);
indexList.Add(idx1);
indexList.Add(idx2);
indexList.Add(idx3);
}
var vertexArr = vertexSoup.verticies.ToArray();
var idxArr = indexList.ToArray();
// upload to GL
vbo = new SSVertexBuffer <SSVertex_PosNormDiffTex1>(vertexArr);
ibo = new SSIndexBuffer(idxArr, vbo);
}
public SSMeshOBJSubsetData(SSVertex_PosNormTexDiff[] vertices,
UInt16[] indices, UInt16[] wireframeIndices)
{
SSVertexBuffer<SSVertex_PosNormTexDiff> vbo
= new SSVertexBuffer<SSVertex_PosNormTexDiff>(vertices, BufferUsageHint.StaticDraw);
SSIndexBuffer triIbo = new SSIndexBuffer(indices, vbo, BufferUsageHint.StaticDraw);
SSIndexBuffer wireframeIbo = new SSIndexBuffer(wireframeIndices, vbo, BufferUsageHint.StaticDraw);
this.triangleMesh = new SSIndexedMesh<SSVertex_PosNormTexDiff>(vbo, triIbo);
this.wireframeMesh = new SSIndexedMesh<SSVertex_PosNormTexDiff>(vbo, wireframeIbo);
}