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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: 5.0.1 (2012/07/07)
#include "DrawImplicitSurface.h"
#include "Function.h"
WM5_WINDOW_APPLICATION(DrawImplicitSurface);
//----------------------------------------------------------------------------
DrawImplicitSurface::DrawImplicitSurface ()
:
WindowApplication2("SampleMathematics/DrawImplicitSurface", 0, 0, 256,
256, Float4(1.0f, 1.0f, 1.0f, 1.0f)),
mTracer(F, DF, 256, 256)
{
mNumSamples = 100;
mBlur = false;
mSize = GetWidth();
}
//----------------------------------------------------------------------------
bool DrawImplicitSurface::OnInitialize ()
{
if (!WindowApplication2::OnInitialize())
{
return false;
}
// Initialize camera and view frustum.
mTracer.Location = Vector3f(2.0f, 0.0f, 0.0f);
mTracer.DVector = Vector3f(-1.0f, 0.0f, 0.0f);
mTracer.UVector = Vector3f(0.0f, 1.0f, 0.0f);
mTracer.RVector = mTracer.DVector.Cross(mTracer.UVector);
mTracer.Near = 0.1f;
mTracer.Far = 10.0f;
mTracer.HalfWidth = 2.0f*mTracer.Near; // 90 degree horizontal FOV
mTracer.HalfHeight = 2.0f*mTracer.Near; // 90 degree vertical FOV
// The light direction will be the camera direction so that we can see
// the surface from all camera locations.
// Draw the level surface.
mTracer.DrawSurface(mNumSamples, mTracer.DVector, mBlur);
OnDisplay();
return true;
}
//----------------------------------------------------------------------------
void DrawImplicitSurface::OnDisplay ()
{
ClearScreen();
const float* image = mTracer.GetImage();
for (int y = 0, i = 0; y < mTracer.GetHeight(); ++y)
{
for (int x = 0; x < mTracer.GetWidth(); ++x, ++i)
{
unsigned char value = (unsigned char)(255.0f*image[i]);
SetPixel(x, y, ColorRGB(value, value, value));
}
}
WindowApplication2::OnDisplay();
}
//----------------------------------------------------------------------------
bool DrawImplicitSurface::OnKeyDown (unsigned char key, int x, int y)
{
if (WindowApplication2::OnKeyDown(key, x, y))
{
return true;
}
switch (key)
{
case '+': // increase ray sample size
case '=':
mNumSamples += 100;
mTracer.DrawSurface(mNumSamples, mTracer.DVector, mBlur);
OnDisplay();
return true;
case '-': // decrease ray sample size
case '_':
if (mNumSamples > 100)
{
mNumSamples -= 100;
mTracer.DrawSurface(mNumSamples, mTracer.DVector, mBlur);
OnDisplay();
}
return true;
case 'b': // toggle blur of output image
case 'B':
mBlur = !mBlur;
mTracer.DrawSurface(mNumSamples, mTracer.DVector, mBlur);
OnDisplay();
return true;
}
return false;
}
//----------------------------------------------------------------------------
bool DrawImplicitSurface::OnSpecialKeyDown (int key, int, int)
{
// TODO: These are chosen for the specific functions in this
// application. Allow the application to modify these, either by key
// strokes or automatically.
const float trnDelta = 0.25f, rotDelta = 0.1f;
bool moved = false;
float length;
Matrix3f rot;
if (key == KEY_UP_ARROW)
{
// Translate forward in camera direction.
mTracer.Location += trnDelta*mTracer.DVector;
moved = true;
}
else if (key == KEY_DOWN_ARROW)
{
// Translate backward in camera direction.
mTracer.Location -= trnDelta*mTracer.DVector;
moved = true;
}
else if (key == KEY_F1)
{
// Rotate about camera right, move up on view sphere.
length = mTracer.Location.Length();
rot.MakeRotation(mTracer.RVector, rotDelta);
mTracer.DVector = rot*mTracer.DVector;
mTracer.UVector = rot*mTracer.UVector;
mTracer.Location = -length*mTracer.DVector;
moved = true;
}
else if (key == KEY_F2)
{
// Rotate about camera right, move down on view sphere.
length = mTracer.Location.Length();
rot.MakeRotation(mTracer.RVector, -rotDelta);
mTracer.DVector = rot*mTracer.DVector;
mTracer.UVector = rot*mTracer.UVector;
mTracer.Location = -length*mTracer.DVector;
moved = true;
}
else if (key == KEY_F3)
{
// Rotate about camera up, move right on view sphere.
length = mTracer.Location.Length();
rot.MakeRotation(mTracer.UVector, rotDelta);
mTracer.DVector = rot*mTracer.DVector;
mTracer.RVector = rot*mTracer.RVector;
mTracer.Location = -length*mTracer.DVector;
moved = true;
}
else if (key == KEY_F4)
{
// Rotate about camera up, move left on view sphere.
length = mTracer.Location.Length();
rot.MakeRotation(mTracer.UVector, -rotDelta);
mTracer.DVector = rot*mTracer.DVector;
mTracer.RVector = rot*mTracer.RVector;
mTracer.Location = -length*mTracer.DVector;
moved = true;
}
else if (key == KEY_F5)
{
// Rotate about camera direction, roll counterclockwise.
length = mTracer.Location.Length();
rot.MakeRotation(mTracer.DVector, rotDelta);
mTracer.UVector = rot*mTracer.UVector;
mTracer.RVector = rot*mTracer.RVector;
moved = true;
}
else if (key == KEY_F6)
{
// Rotate about camera direction, roll clockwise.
length = mTracer.Location.Length();
rot.MakeRotation(mTracer.DVector, -rotDelta);
mTracer.UVector = rot*mTracer.UVector;
mTracer.RVector = rot*mTracer.RVector;
moved = true;
}
if (moved)
{
mTracer.DrawSurface(mNumSamples, mTracer.DVector, mBlur);
OnDisplay();
}
return true;
}
//----------------------------------------------------------------------------
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