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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 "VolumeRenderer.h"
WM5_WINDOW_APPLICATION(VolumeRenderer);
#define TEST_VR
//----------------------------------------------------------------------------
VolumeRenderer::VolumeRenderer ()
:
WindowApplication2("SampleImagics/VolumeRenderer", 0, 0, 0, 0,
Float4(1.0f, 1.0f, 1.0f, 1.0f))
{
mButtonDown = false;
mBound = 0;
mGamma = 0.25f;
}
//----------------------------------------------------------------------------
bool VolumeRenderer::OnPrecreate ()
{
if (!WindowApplication2::OnPrecreate())
{
return false;
}
#ifdef TEST_VR
std::string imageName = Environment::GetPathR("Molecule.im");
size_t length = strlen(imageName.c_str());
char* filename = new1<char>(length + 1);
strcpy(filename, imageName.c_str());
#else
char* filename = 0;
TheCommand->GetFilename(filename);
if (!filename)
{
// Input filename must be specified on the command line.
return false;
}
#endif
// Load image, must be 3D and pixels must be unsigned char.
int numDimensions, numPixels, rtti, sizeOf;
int* bounds = 0;
char* data = 0;
bool loaded = Lattice::LoadRaw(filename, numDimensions, bounds,
numPixels, rtti, sizeOf, data);
if (!loaded || numDimensions != 3 || rtti != Euchar::GetRTTI())
{
delete1(data);
delete1(filename);
return false;
}
ImageUChar3D* image = new0 ImageUChar3D(bounds[0], bounds[1], bounds[2],
(Euchar*)data);
// Get the maximum bound.
int maxBound = image->GetBound(0);
if (image->GetBound(1) > maxBound)
{
maxBound = image->GetBound(1);
}
if (image->GetBound(2) > maxBound)
{
maxBound = image->GetBound(2);
}
mBound = 2*maxBound;
mHBound = (float)maxBound;
mRT = new0 RayTrace(image, mGamma);
delete0(image);
// Resize application window.
mWidth = mBound;
mHeight = mBound;
delete1(filename);
delete1(bounds);
return true;
}
//----------------------------------------------------------------------------
bool VolumeRenderer::OnInitialize ()
{
if (!WindowApplication2::OnInitialize())
{
return false;
}
mRT->Trace(1);
OnDisplay();
return true;
}
//----------------------------------------------------------------------------
void VolumeRenderer::OnTerminate ()
{
delete0(mRT);
WindowApplication2::OnTerminate();
}
//----------------------------------------------------------------------------
void VolumeRenderer::OnDisplay ()
{
mRT->DrawWireFrame();
for (int y = 0; y < mBound; ++y)
{
for (int x = 0; x < mBound; ++x)
{
int i = x + mBound*y;
unsigned int value = mRT->GetRendered(i);
unsigned char r = GetRed24(value);
unsigned char g = GetGreen24(value);
unsigned char b = GetBlue24(value);
SetPixel(x, y, ColorRGB(r, g, b));
}
}
WindowApplication2::OnDisplay();
}
//----------------------------------------------------------------------------
bool VolumeRenderer::OnMouseClick (int button, int state, int x, int y,
unsigned int)
{
if (button != MOUSE_LEFT_BUTTON)
{
return false;
}
if (state == MOUSE_DOWN)
{
mButtonDown = true;
mX0 = (x - mHBound)/mHBound;
mY0 = (y - mHBound)/mHBound;
}
else
{
mButtonDown = false;
mX1 = (x - mHBound)/mHBound;
mY1 = (y - mHBound)/mHBound;
if (mRT->MoveTrackBall(mX0, mY0, mX1, mY1))
{
mRT->Trace(1);
OnDisplay();
}
}
return true;
}
//----------------------------------------------------------------------------
bool VolumeRenderer::OnMotion (int, int x, int y, unsigned int)
{
if (!mButtonDown)
{
return false;
}
// Save old frame.
float saveFrame[3][3];
int row, col;
for (row = 0; row < 3; ++row)
{
for (col = 0; col < 3; ++col)
{
saveFrame[row][col] = mRT->Frame(row,col);
}
}
mX1 = (x - mHBound)/mHBound;
mY1 = (y - mHBound)/mHBound;
if (mRT->MoveTrackBall(mX0, mY0, mX1, mY1))
{
// Trace every second ray, then fill in with nearest neighbor values.
mRT->Trace(2);
OnDisplay();
// Restore old frame.
for (row = 0; row < 3; ++row)
{
for (col = 0; col < 3; ++col)
{
mRT->Frame(row,col) = saveFrame[row][col];
}
}
}
return true;
}
//----------------------------------------------------------------------------
bool VolumeRenderer::OnKeyDown (unsigned char key, int x, int y)
{
if (WindowApplication2::OnKeyDown(key, x, y))
{
return true;
}
switch (key)
{
case '+':
mGamma /= 1.1f;
mRT->Correction(mGamma);
OnDisplay();
return true;
case '-':
mGamma *= 1.1f;
mRT->Correction(mGamma);
OnDisplay();
return true;
}
return false;
}
//----------------------------------------------------------------------------
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