//Geometry Setup
//BSphere calculator
public GLVao setupBSphere(int instance_id)
{
float radius = 0.5f * (metaData.AABBMIN - metaData.AABBMAX).Length;
Vector4 bsh_center = new Vector4(metaData.AABBMIN + 0.5f * (metaData.AABBMAX - metaData.AABBMIN), 1.0f);
Matrix4 t_mat = GLMeshBufferManager.getInstanceWorldMat(this, instance_id);
bsh_center = bsh_center * t_mat;
//Create Sphere vbo
return(new Primitives.Sphere(bsh_center.Xyz, radius).getVAO());
}
public void renderBbox(int pass, int instance_id)
{
if (GLMeshBufferManager.getInstanceOccludedStatus(this, instance_id))
{
return;
}
Matrix4 worldMat = GLMeshBufferManager.getInstanceWorldMat(this, instance_id);
//worldMat = worldMat.ClearRotation();
Vector4[] tr_AABB = new Vector4[2];
//tr_AABB[0] = new Vector4(metaData.AABBMIN, 1.0f) * worldMat;
//tr_AABB[1] = new Vector4(metaData.AABBMAX, 1.0f) * worldMat;
tr_AABB[0] = new Vector4(instanceRefs[instance_id].AABBMIN, 1.0f);
tr_AABB[1] = new Vector4(instanceRefs[instance_id].AABBMAX, 1.0f);
//tr_AABB[0] = new Vector4(metaData.AABBMIN, 0.0f);
//tr_AABB[1] = new Vector4(metaData.AABBMAX, 0.0f);
//Generate all 8 points from the AABB
float[] verts1 = new float[] { tr_AABB[0].X, tr_AABB[0].Y, tr_AABB[0].Z,
tr_AABB[1].X, tr_AABB[0].Y, tr_AABB[0].Z,
tr_AABB[0].X, tr_AABB[1].Y, tr_AABB[0].Z,
tr_AABB[1].X, tr_AABB[1].Y, tr_AABB[0].Z,
tr_AABB[0].X, tr_AABB[0].Y, tr_AABB[1].Z,
tr_AABB[1].X, tr_AABB[0].Y, tr_AABB[1].Z,
tr_AABB[0].X, tr_AABB[1].Y, tr_AABB[1].Z,
tr_AABB[1].X, tr_AABB[1].Y, tr_AABB[1].Z };
//Indices
Int32[] indices = new Int32[] { 0, 1, 2,
2, 1, 3,
1, 5, 3,
5, 7, 3,
5, 4, 6,
5, 6, 7,
0, 2, 4,
2, 6, 4,
3, 6, 2,
7, 6, 3,
0, 4, 5,
1, 0, 5 };
//Generate OpenGL buffers
int arraysize = sizeof(float) * verts1.Length;
int vb_bbox, eb_bbox;
GL.GenBuffers(1, out vb_bbox);
GL.GenBuffers(1, out eb_bbox);
//Upload vertex buffer
GL.BindBuffer(BufferTarget.ArrayBuffer, vb_bbox);
//Allocate to NULL
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(2 * arraysize), (IntPtr)null, BufferUsageHint.StaticDraw);
//Add verts data
GL.BufferSubData(BufferTarget.ArrayBuffer, (IntPtr)0, (IntPtr)arraysize, verts1);
////Upload index buffer
GL.BindBuffer(BufferTarget.ElementArrayBuffer, eb_bbox);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(sizeof(Int32) * indices.Length), indices, BufferUsageHint.StaticDraw);
//Render
GL.BindBuffer(BufferTarget.ArrayBuffer, vb_bbox);
GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 0, 0);
GL.EnableVertexAttribArray(0);
//InverseBind Matrices
//loc = GL.GetUniformLocation(shader_program, "invBMs");
//GL.UniformMatrix4(loc, this.vbo.jointData.Count, false, this.vbo.invBMats);
//Render Elements
GL.PointSize(5.0f);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, eb_bbox);
GL.DrawRangeElements(PrimitiveType.Triangles, 0, verts1.Length,
indices.Length, DrawElementsType.UnsignedInt, IntPtr.Zero);
GL.DisableVertexAttribArray(0);
GL.DeleteBuffer(vb_bbox);
GL.DeleteBuffer(eb_bbox);
}