/// <summary>
/// createGrassMesh
/// This demonstrates how to create a manual mesh
/// only use static members of MeshBuilderHelper to help set vertex and index data.
/// </summary>
void createGrassMesh()
{
OgreDotNet.MeshPtr mp = MeshManager.Instance.CreateManual(GRASS_MESH_NAME, "General");
SubMesh sm = mp.Get().CreateSubMesh();
sm.useSharedVertices = false;
sm.vertexData = new VertexData();
sm.vertexData.vertexStart = 0;
sm.vertexData.vertexCount = 12;
//mIndexType = HardwareIndexBuffer::IT_16BIT;
VertexDeclaration dcl = sm.vertexData.vertexDeclaration;
UInt32 offset = 0;
UInt32 offPos = dcl.addElement(0, offset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_POSITION).getOffset();
offset = VertexElement.getTypeSize(VertexElementType.VET_FLOAT3);
UInt32 offNorm = dcl.addElement(0, offset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_NORMAL).getOffset();
offset += VertexElement.getTypeSize(VertexElementType.VET_FLOAT3);
UInt32 offUV = dcl.addElement(0, offset, VertexElementType.VET_FLOAT2, VertexElementSemantic.VES_TEXTURE_COORDINATES).getOffset();
offset += VertexElement.getTypeSize(VertexElementType.VET_FLOAT2);
UInt32 vertexsize = offset;
mLog.LogMessage(string.Format("createGrassMesh vertexsize={0}", vertexsize));
HardwareVertexBufferSharedPtr vbuf = HardwareBufferManager.getSingleton().createVertexBuffer(
vertexsize, 12, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
IntPtr pV = vbuf.Get().Lock(HardwareBuffer.LockOptions.HBL_DISCARD);
Vector3 vec = new Vector3(GRASS_WIDTH / 2.0f, 0.0f, 0.0f);
Quaternion rot = Quaternion.FromAngleAxis(60, Vector3.UnitY);
uint i;
for (i = 0; i < 3; ++i)
{
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 0, offPos, -vec.x, GRASS_HEIGHT, -vec.z); //position
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 0, offNorm, 0.0f, 1.0f, 0.0f); //normal
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 0, offUV, 0.0f, 0.0f); //uv
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 1, offPos, vec.x, GRASS_HEIGHT, vec.z); //position
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 1, offNorm, 0.0f, 1.0f, 0.0f); //normal
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 1, offUV, 1.0f, 0.0f); //uv
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 2, offPos, -vec.x, 0.0f, -vec.z); //position
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 2, offNorm, 0.0f, 1.0f, 0.0f); //normal
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 2, offUV, 0.0f, 1.0f); //uv
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 3, offPos, vec.x, 0.0f, vec.z); //position
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 3, offNorm, 0.0f, 1.0f, 0.0f); //normal
OgreDotNet.MeshBuilderHelper.SetVertexFloat(pV, vertexsize, (i * 4) + 3, offUV, 1.0f, 1.0f); //uv
vec = rot * vec;
}
vbuf.Get().Unlock();
sm.vertexData.vertexBufferBinding.setBinding(0, vbuf);
sm.indexData.indexCount = 6 * 3;
sm.indexData.indexBuffer = HardwareBufferManager.getSingleton().createIndexBuffer(
HardwareIndexBuffer.IndexType.IT_16BIT, 6 * 3, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
IntPtr pI = sm.indexData.indexBuffer.Get().Lock(HardwareBuffer.LockOptions.HBL_DISCARD);
for (i = 0; i < 3; ++i)
{
UInt16 off = (UInt16)(i * 4);
OgreDotNet.MeshBuilderHelper.SetIndex16bit(pI, (i * 2) + 0, (UInt16)(0 + off), (UInt16)(3 + off), (UInt16)(1 + off));
OgreDotNet.MeshBuilderHelper.SetIndex16bit(pI, (i * 2) + 1, (UInt16)(0 + off), (UInt16)(2 + off), (UInt16)(3 + off));
}
sm.indexData.indexBuffer.Get().Unlock();
sm.SetMaterialName(GRASS_MATERIAL);
mp.Get().Load();
}
private unsafe void createCube(string name, Mogre.Vector3 gpose, double d)
{
MeshPtr msh = MeshManager.Singleton.CreateManual(name, "General");
SubMesh sub1 = msh.CreateSubMesh("1");
const float sqrt13 = 0.577350269f; /* sqrt(1/3) */
const int nVertices = 8;
const int vbufCount = 3 * 2 * nVertices;
float[] vertices = new float[vbufCount] {
(float)(gpose.x - d / 2), (float)(gpose.y + d / 2), (float)(gpose.z - d / 2), //0 position
-sqrt13, sqrt13, -sqrt13, //0 normal A
(float)(gpose.x + d / 2), (float)(gpose.y + d / 2), (float)(gpose.z - d / 2), //1 position
sqrt13, sqrt13, -sqrt13, //1 normal B
(float)(gpose.x + d / 2), (float)(gpose.y - d / 2), (float)(gpose.z - d / 2), //2 position
sqrt13, -sqrt13, -sqrt13, //2 normal F
(float)(gpose.x - d / 2), (float)(gpose.y - d / 2), (float)(gpose.z - d / 2), //3 position
-sqrt13, -sqrt13, -sqrt13, //3 normal H
(float)(gpose.x - d / 2), (float)(gpose.y + d / 2), (float)(gpose.z + d / 2),
-sqrt13, sqrt13, sqrt13, //4 normal C
(float)(gpose.x + d / 2), (float)(gpose.y + d / 2), (float)(gpose.z + d / 2),
sqrt13, sqrt13, sqrt13, //5 normal D
(float)(gpose.x + d / 2), (float)(gpose.y - d / 2), (float)(gpose.z + d / 2),
sqrt13, -sqrt13, sqrt13, //6 normal E
(float)(gpose.x - d / 2), (float)(gpose.y - d / 2), (float)(gpose.z + d / 2),
-sqrt13, -sqrt13, sqrt13, //7 normal G
};
const int ibufCount = 36;
ushort[] faces = new ushort[ibufCount] {
//back
0, 2, 3,
0, 1, 2,
//right
1, 6, 2,
1, 5, 6,
//front
4, 6, 5,
4, 7, 6,
//left
0, 7, 4,
0, 3, 7,
//top
0, 5, 1,
0, 4, 5,
//bottom
2, 7, 3,
2, 6, 7
};
sub1.vertexData = new VertexData();
sub1.vertexData.vertexCount = nVertices;
VertexDeclaration decl = sub1.vertexData.vertexDeclaration;
uint offset = 0;
//position
decl.AddElement(0, offset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_POSITION);
offset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT3);
//normal
decl.AddElement(0, offset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_NORMAL);
offset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT3);
HardwareVertexBufferSharedPtr vbuf = HardwareBufferManager.Singleton.CreateVertexBuffer(offset, sub1.vertexData.vertexCount, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
VertexBufferBinding bind = sub1.vertexData.vertexBufferBinding;
void *pVertices;
fixed(float *pFVertice = vertices)
{
pVertices = (void *)pFVertice;
}
vbuf.WriteData(0, vbuf.SizeInBytes, pVertices, true);
bind.SetBinding(0, vbuf);
void *pFaces;
fixed(ushort *pUFaces = faces)
{
pFaces = (void *)pUFaces;
}
HardwareIndexBufferSharedPtr ibuf = HardwareBufferManager.Singleton.CreateIndexBuffer(HardwareIndexBuffer.IndexType.IT_16BIT, ibufCount, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
ibuf.WriteData(0, ibuf.SizeInBytes, pFaces, true);
sub1.useSharedVertices = false;
sub1.indexData.indexBuffer = ibuf;
sub1.indexData.indexCount = ibufCount;
sub1.indexData.indexStart = 0;
sub1.SetMaterialName("Examples/10PointBlock");
msh._setBounds(new AxisAlignedBox(-100, -100, -100, 100, 100, 100));
msh._setBoundingSphereRadius(Mogre.Math.Sqrt(3 * 100 * 100));
msh.Load();
}
private void CreateGrassMesh()
{
// Each grass section is 3 planes at 60 degrees to each other
// Normals point straight up to simulate correct lighting
Mesh msh = MeshManager.Singleton.CreateManual(GRASS_MESH_NAME, ResourceGroupManager.DEFAULT_RESOURCE_GROUP_NAME, null);
SubMesh sm = msh.CreateSubMesh();
sm.useSharedVertices = false;
sm.vertexData = new VertexData();
sm.vertexData.vertexStart = 0;
sm.vertexData.vertexCount = 12;
VertexDeclaration dcl = sm.vertexData.vertexDeclaration;
uint offset = 0;
dcl.AddElement(0, offset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_POSITION);
offset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT3);
dcl.AddElement(0, offset, VertexElementType.VET_FLOAT3, VertexElementSemantic.VES_NORMAL);
offset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT3);
dcl.AddElement(0, offset, VertexElementType.VET_FLOAT2, VertexElementSemantic.VES_TEXTURE_COORDINATES);
offset += VertexElement.GetTypeSize(VertexElementType.VET_FLOAT2);
HardwareVertexBufferSharedPtr vbuf = HardwareBufferManager.Singleton.CreateVertexBuffer(offset, 12, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
int i;
unsafe {
float *pData = (float *)(vbuf.Lock(HardwareBuffer.LockOptions.HBL_DISCARD));
Vector3 baseVec = new Vector3(GRASS_WIDTH / 2, 0, 0);
Vector3 vec = baseVec;
Quaternion rot = new Quaternion();
rot.FromAngleAxis(Math.DegreesToRadians(60), Vector3.UNIT_Y);
for (i = 0; i < 3; ++i)
{
//position
*pData++ = -vec.x;
*pData++ = GRASS_HEIGHT;
*pData++ = -vec.z;
// normal
*pData++ = 0;
*pData++ = 1;
*pData++ = 0;
// uv
*pData++ = 0;
*pData++ = 0;
// position
*pData++ = vec.x;
*pData++ = GRASS_HEIGHT;
*pData++ = vec.z;
// normal
*pData++ = 0;
*pData++ = 1;
*pData++ = 0;
// uv
*pData++ = 1;
*pData++ = 0;
// position
*pData++ = -vec.x;
*pData++ = 0;
*pData++ = -vec.z;
// normal
*pData++ = 0;
*pData++ = 1;
*pData++ = 0;
// uv
*pData++ = 0;
*pData++ = 1;
// position
*pData++ = vec.x;
*pData++ = 0;
*pData++ = vec.z;
// normal
*pData++ = 0;
*pData++ = 1;
*pData++ = 0;
// uv
*pData++ = 1;
*pData++ = 1;
vec = rot * vec;
} //for
} //unsafe
vbuf.Unlock();
sm.vertexData.vertexBufferBinding.SetBinding(0, vbuf);
sm.indexData.indexCount = 6 * 3;
sm.indexData.indexBuffer = HardwareBufferManager.Singleton.CreateIndexBuffer(HardwareIndexBuffer.IndexType.IT_16BIT, 6 * 3, HardwareBuffer.Usage.HBU_STATIC_WRITE_ONLY);
unsafe {
ushort *pI = (ushort *)(sm.indexData.indexBuffer.Lock(HardwareBuffer.LockOptions.HBL_DISCARD));
for (i = 0; i < 3; ++i)
{
int off = i * 4;
* pI++ = (ushort)(off);
* pI++ = (ushort)(off + 3);
* pI++ = (ushort)(off + 1);
*pI++ = (ushort)(off + 0);
*pI++ = (ushort)(off + 2);
*pI++ = (ushort)(off + 3);
}
}
sm.indexData.indexBuffer.Unlock();
sm.SetMaterialName(GRASS_MATERIAL);
msh.Load();
}