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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: 5.7.0 (2011/08/29)
#include "IntersectInfiniteCylinders.h"
WM5_WINDOW_APPLICATION(IntersectInfiniteCylinders);
//----------------------------------------------------------------------------
IntersectInfiniteCylinders::IntersectInfiniteCylinders ()
:
WindowApplication3("SampleMathematics/IntersectInfiniteCylinders", 0, 0,
640, 480, Float4(0.75f, 0.75f, 0.75f, 1.0f)),
mTextColor(1.0f, 1.0f, 1.0f, 1.0f),
mRadius0(3.0f),
mRadius1(2.0f),
mHeight(100.0f),
mC0(4.0f),
mW1(3.0f/5.0f),
mW2(4.0f/5.0f)
{
mAngle = Mathf::ATan2(mW1, mW2);
}
//----------------------------------------------------------------------------
bool IntersectInfiniteCylinders::OnInitialize ()
{
if (!WindowApplication3::OnInitialize())
{
return false;
}
mCamera->SetFrustum(60.0f, GetAspectRatio(), 1.0f, 1000.0f);
APoint camPosition(0.0f, -16.0f, 0.0f);
AVector camDVector(0.0f, 1.0f, 0.0f);
AVector camUVector(0.0f, 0.0f, 1.0f);
AVector camRVector = camDVector.Cross(camUVector);
mCamera->SetFrame(camPosition, camDVector, camUVector, camRVector);
CreateScene();
mScene->Update();
InitializeCameraMotion(0.01f, 0.001f);
InitializeObjectMotion(mScene);
return true;
}
//----------------------------------------------------------------------------
void IntersectInfiniteCylinders::OnTerminate ()
{
mScene = 0;
mWireState = 0;
mCylinder0 = 0;
mCylinder1 = 0;
WindowApplication3::OnTerminate();
}
//----------------------------------------------------------------------------
void IntersectInfiniteCylinders::OnIdle ()
{
MeasureTime();
MoveCamera();
if (MoveObject())
{
mScene->Update();
}
if (mRenderer->PreDraw())
{
mRenderer->ClearBuffers();
mRenderer->Draw(mVisible);
DrawFrameRate(8, GetHeight()-8, mTextColor);
mRenderer->PostDraw();
mRenderer->DisplayColorBuffer();
}
UpdateFrameCount();
}
//----------------------------------------------------------------------------
bool IntersectInfiniteCylinders::OnKeyDown (unsigned char key, int x, int y)
{
switch (key)
{
case 'w':
case 'W':
{
mWireState->Enabled = !mWireState->Enabled;
return true;
}
}
return WindowApplication3::OnKeyDown(key, x, y);
}
//----------------------------------------------------------------------------
void IntersectInfiniteCylinders::CreateScene ()
{
mScene = new0 Node();
mWireState = new0 WireState();
mRenderer->SetOverrideWireState(mWireState);
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
int vstride = vformat->GetStride();
StandardMesh sm(vformat);
VertexBufferAccessor vba;
int i;
// Create the canonical cylinder.
mCylinder0 = sm.Cylinder(32, 128, mRadius0, mHeight, true);
mScene->AttachChild(mCylinder0);
mVisible.Insert(mCylinder0);
vba.ApplyTo(mCylinder0);
for (i = 0; i < vba.GetNumVertices(); ++i)
{
vba.Color<Float3>(0, i) = Float3(0.5f, 0.0f, 0.0f);
}
mCylinder0->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
// Create the other cylinder.
mCylinder1 = sm.Cylinder(32, 128, mRadius1, mHeight, true);
mScene->AttachChild(mCylinder1);
mVisible.Insert(mCylinder1);
vba.ApplyTo(mCylinder1);
for (i = 0; i < vba.GetNumVertices(); ++i)
{
vba.Color<Float3>(0, i) = Float3(0.0f, 0.0f, 0.5f);
}
mCylinder1->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
mCylinder1->LocalTransform.SetRotate(HMatrix(AVector::UNIT_X, -mAngle));
mCylinder1->LocalTransform.SetTranslate(APoint(mC0, 0.0f, 0.0f));
// Create the intersection curve.
const float minTheta = 2.0f*Mathf::PI/3.0f;
const float maxTheta = 4.0f*Mathf::PI/3.0f;
float theta, cs, sn, t, tmp, discr;
VertexBuffer* vbuffer = new0 VertexBuffer(1024, vstride);
mCurve0 = new0 Polysegment(vformat, vbuffer, true);
mScene->AttachChild(mCurve0);
vba.ApplyTo(mCurve0);
int numPoints = vba.GetNumVertices();
float multiplier = (maxTheta - minTheta)/(float)(numPoints - 1);
for (i = 0; i < numPoints; ++i)
{
theta = minTheta + multiplier*i;
cs = Mathf::Cos(theta);
sn = Mathf::Sin(theta);
tmp = mC0 + mRadius1*cs;
discr = Mathf::FAbs(mRadius0*mRadius0 - tmp*tmp);
t = (-mRadius1*mW2*sn - Mathf::Sqrt(discr))/mW1;
Float3& position = vba.Position<Float3>(i);
position[0] = mC0 + mRadius1*cs;
position[1] = +mRadius1*sn*mW2 + t*mW1;
position[2] = -mRadius1*sn*mW1 + t*mW2;
vba.Color<Float3>(0, i) = Float3(0.0f, 0.5f, 0.0f);
}
mCurve0->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
mVisible.Insert(mCurve0);
vbuffer = new0 VertexBuffer(1024, vstride);
mCurve1 = new0 Polysegment(vformat, vbuffer, true);
mScene->AttachChild(mCurve1);
vba.ApplyTo(mCurve1);
numPoints = vba.GetNumVertices();
multiplier = (maxTheta - minTheta)/(float)(numPoints - 1);
for (i = 0; i < numPoints; ++i)
{
theta = minTheta + multiplier*i;
cs = Mathf::Cos(theta);
sn = Mathf::Sin(theta);
tmp = mC0 + mRadius1*cs;
discr = Mathf::FAbs(mRadius0*mRadius0 - tmp*tmp);
t = (-mRadius1*mW2*sn + Mathf::Sqrt(discr))/mW1;
Float3& position = vba.Position<Float3>(i);
position[0] = mC0 + mRadius1*cs;
position[1] = +mRadius1*sn*mW2 + t*mW1;
position[2] = -mRadius1*sn*mW1 + t*mW2;
vba.Color<Float3>(0, i) = Float3(0.0f, 0.5f, 0.0f);
}
mCurve1->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
mVisible.Insert(mCurve1);
}
//----------------------------------------------------------------------------
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