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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
#include "Wm5GraphicsPCH.h"
#include "Wm5RectangleSurface.h"
#include "Wm5Renderer.h"
#include "Wm5VertexBufferAccessor.h"
using namespace Wm5;
WM5_IMPLEMENT_RTTI(Wm5, TriMesh, RectangleSurface);
WM5_IMPLEMENT_STREAM(RectangleSurface);
WM5_IMPLEMENT_FACTORY(RectangleSurface);
WM5_IMPLEMENT_DEFAULT_NAMES(TriMesh, RectangleSurface);
//----------------------------------------------------------------------------
RectangleSurface::RectangleSurface (ParametricSurfacef* surface,
int numUSamples, int numVSamples, VertexFormat* vformat,
const Float2* tcoordMin, const Float2* tcoordMax)
:
mSurface(surface),
mNumUSamples(numUSamples),
mNumVSamples(numVSamples)
{
assertion(surface && surface->IsRectangular(), "Invalid surface\n");
mVFormat = vformat;
float uMin = mSurface->GetUMin();
float uRange = mSurface->GetUMax() - uMin;
float uDelta = uRange/(float)(mNumUSamples - 1);
float vMin = mSurface->GetVMin();
float vRange = mSurface->GetVMax() - vMin;
float vDelta = vRange/(float)(mNumVSamples - 1);
// Compute the vertices, normals, and texture coordinates.
int numVertices = mNumUSamples*mNumVSamples;
int vstride = vformat->GetStride();
mVBuffer = new0 VertexBuffer(numVertices, vstride);
VertexBufferAccessor vba(vformat, mVBuffer);
float tuDelta = 0.0f, tvDelta = 0.0f;
if (tcoordMin && tcoordMax)
{
tuDelta = ((*tcoordMax)[0] - (*tcoordMin)[0])/uRange;
tvDelta = ((*tcoordMax)[1] - (*tcoordMin)[1])/vRange;
}
int uIndex, vIndex, i;
for (uIndex = 0, i = 0; uIndex < mNumUSamples; ++uIndex)
{
float uIncr = uDelta*uIndex;
float u = uMin + uIncr;
for (vIndex = 0; vIndex < mNumVSamples; ++vIndex, ++i)
{
float vIncr = vDelta*vIndex;
float v = vMin + vIncr;
vba.Position<Vector3f>(i) = mSurface->P(u, v);
if (vba.HasNormal())
{
Vector3f pos, tan0, tan1, normal;
mSurface->GetFrame(u, v, pos, tan0, tan1, normal);
vba.Normal<Vector3f>(i) = normal;
}
const int numTCoords = VertexFormat::AM_MAX_TCOORD_UNITS;
Float2 tcoord(
(*tcoordMin)[0] + tuDelta*uIncr,
(*tcoordMin)[1] + tvDelta*vIncr);
for (int unit = 0; unit < numTCoords; ++unit)
{
if (vba.HasTCoord(unit))
{
assertion(vba.GetTCoordChannels(unit) == 2,
"Texture coordinate must be 2D\n");
vba.TCoord<Float2>(unit, i) = tcoord;
}
}
}
}
// Compute the surface triangle indices.
int numTriangles = 2*(mNumUSamples-1)*(mNumVSamples-1);
int numIndices = 3*numTriangles;
mIBuffer = new0 IndexBuffer(numIndices, sizeof(int));
int* indices = (int*)mIBuffer->GetData();
for (uIndex = 0, i = 0; uIndex < mNumUSamples - 1; ++uIndex)
{
int i0 = i;
int i1 = i0 + 1;
i += mNumVSamples;
int i2 = i;
int i3 = i2 + 1;
for (vIndex = 0; vIndex < mNumVSamples - 1; ++vIndex, indices += 6)
{
indices[0] = i0;
indices[1] = i1;
indices[2] = i2;
indices[3] = i1;
indices[4] = i3;
indices[5] = i2;
i0++;
i1++;
i2++;
i3++;
}
}
UpdateModelSpace(Visual::GU_NORMALS);
}
//----------------------------------------------------------------------------
RectangleSurface::~RectangleSurface ()
{
delete0(mSurface);
}
//----------------------------------------------------------------------------
void RectangleSurface::UpdateSurface ()
{
float uMin = mSurface->GetUMin();
float uDelta = (mSurface->GetUMax() - uMin)/(float)(mNumUSamples - 1);
float vMin = mSurface->GetVMin();
float vDelta = (mSurface->GetVMax() - vMin)/(float)(mNumVSamples - 1);
VertexBufferAccessor vba(mVFormat, mVBuffer);
for (int uIndex = 0, i = 0; uIndex < mNumUSamples; ++uIndex)
{
float u = uMin + uDelta*uIndex;
for (int vIndex = 0; vIndex < mNumVSamples; ++vIndex, ++i)
{
float v = vMin + vDelta*vIndex;
vba.Position<Vector3f>(i) = mSurface->P(u, v);
if (vba.HasNormal())
{
Vector3f pos, tan0, tan1, normal;
mSurface->GetFrame(u, v, pos, tan0, tan1, normal);
vba.Normal<Vector3f>(i) = normal;
}
}
}
UpdateModelSpace(Visual::GU_NORMALS);
Renderer::UpdateAll(mVBuffer);
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Streaming support.
//----------------------------------------------------------------------------
RectangleSurface::RectangleSurface (LoadConstructor value)
:
TriMesh(value),
mSurface(0),
mNumUSamples(0),
mNumVSamples(0)
{
}
//----------------------------------------------------------------------------
void RectangleSurface::Load (InStream& source)
{
WM5_BEGIN_DEBUG_STREAM_LOAD(source);
TriMesh::Load(source);
source.Read(mNumUSamples);
source.Read(mNumVSamples);
// TODO. See note in RectangleSurface::Save.
mSurface = 0;
WM5_END_DEBUG_STREAM_LOAD(RectangleSurface, source);
}
//----------------------------------------------------------------------------
void RectangleSurface::Link (InStream& source)
{
TriMesh::Link(source);
}
//----------------------------------------------------------------------------
void RectangleSurface::PostLink ()
{
TriMesh::PostLink();
}
//----------------------------------------------------------------------------
bool RectangleSurface::Register (OutStream& target) const
{
return TriMesh::Register(target);
}
//----------------------------------------------------------------------------
void RectangleSurface::Save (OutStream& target) const
{
WM5_BEGIN_DEBUG_STREAM_SAVE(target);
TriMesh::Save(target);
target.Write(mNumUSamples);
target.Write(mNumVSamples);
// TODO. The class ParametricSurface3 is abstract and does not know
// about the data representation for the derived-class object that is
// passed to the RectangleSurface constructor. Because of this, any
// loaded RectangleSurface object will require the application to
// manually set the surface via the SetSurface() member function.
//
// Streaming support should be added to the surface classes.
WM5_END_DEBUG_STREAM_SAVE(RectangleSurface, target);
}
//----------------------------------------------------------------------------
int RectangleSurface::GetStreamingSize () const
{
int size = TriMesh::GetStreamingSize();
size += sizeof(mNumUSamples);
size += sizeof(mNumVSamples);
return size;
}
//----------------------------------------------------------------------------
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