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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 "PolygonOffsets.h"
WM5_WINDOW_APPLICATION(PolygonOffsets);
//----------------------------------------------------------------------------
PolygonOffsets::PolygonOffsets ()
:
WindowApplication3("SampleGraphics/PolygonOffsets", 0, 0, 640, 480,
Float4(0.5f, 0.0f, 1.0f, 1.0f)),
mTextColor(1.0f, 1.0f, 1.0f, 1.0f)
{
}
//----------------------------------------------------------------------------
bool PolygonOffsets::OnInitialize ()
{
if (!WindowApplication3::OnInitialize())
{
return false;
}
// Set up the camera.
mCamera->SetFrustum(60.0f, GetAspectRatio(), 1.0f, 1000.0f);
APoint camPosition(0.0f, 0.0f, -16.0f);
AVector camDVector(0.0f, 0.0f, 1.0f);
AVector camUVector(0.0f, 1.0f, 0.0f);
AVector camRVector = camDVector.Cross(camUVector);
mCamera->SetFrame(camPosition, camDVector, camUVector, camRVector);
CreateScene();
// Initial update of objects.
mScene->Update();
// Initial culling of scene.
mCuller.SetCamera(mCamera);
mCuller.ComputeVisibleSet(mScene);
InitializeCameraMotion(0.01f, 0.01f);
InitializeObjectMotion(mScene);
return true;
}
//----------------------------------------------------------------------------
void PolygonOffsets::OnTerminate ()
{
mScene = 0;
mWireState = 0;
WindowApplication3::OnTerminate();
}
//----------------------------------------------------------------------------
void PolygonOffsets::OnIdle ()
{
MeasureTime();
if (MoveCamera())
{
mCuller.ComputeVisibleSet(mScene);
}
if (MoveObject())
{
mScene->Update();
mCuller.ComputeVisibleSet(mScene);
}
if (mRenderer->PreDraw())
{
mRenderer->ClearBuffers();
mRenderer->Draw(mCuller.GetVisibleSet());
mRenderer->Draw(8, 16, mTextColor,
"Press UP/DOWN arrows. "
"The left box flickers, the right does not");
DrawFrameRate(8, GetHeight()-8, mTextColor);
mRenderer->PostDraw();
mRenderer->DisplayColorBuffer();
}
UpdateFrameCount();
}
//----------------------------------------------------------------------------
bool PolygonOffsets::OnKeyDown (unsigned char key, int x, int y)
{
if (WindowApplication3::OnKeyDown(key, x, y))
{
return true;
}
switch (key)
{
case 'w':
case 'W':
mWireState->Enabled = !mWireState->Enabled;
return true;
}
return false;
}
//----------------------------------------------------------------------------
void PolygonOffsets::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();
// Vertices to be shared by rectangles 1 and 3.
VertexBuffer* vbuffer0 = new0 VertexBuffer(4, vstride);
VertexBufferAccessor vba(vformat, vbuffer0);
vba.Position<Float3>(0) = Float3(-1.0f, 0.0f, -1.0f);
vba.Position<Float3>(1) = Float3(-1.0f, 0.0f, +1.0f);
vba.Position<Float3>(2) = Float3(+1.0f, 0.0f, +1.0f);
vba.Position<Float3>(3) = Float3(+1.0f, 0.0f, -1.0f);
vba.Color<Float3>(0, 0) = Float3(1.0f, 0.0f, 0.0f);
vba.Color<Float3>(0, 1) = Float3(1.0f, 0.0f, 0.0f);
vba.Color<Float3>(0, 2) = Float3(1.0f, 0.0f, 0.0f);
vba.Color<Float3>(0, 3) = Float3(1.0f, 0.0f, 0.0f);
// Vertices to be shared by rectangles 2 and 4.
VertexBuffer* vbuffer1 = new0 VertexBuffer(4, vstride);
vba.ApplyTo(vformat, vbuffer1);
vba.Position<Float3>(0) = Float3(-1.0f, 0.0f, -1.0f);
vba.Position<Float3>(1) = Float3(-1.0f, 0.0f, +1.0f);
vba.Position<Float3>(2) = Float3(+1.0f, 0.0f, +1.0f);
vba.Position<Float3>(3) = Float3(+1.0f, 0.0f, -1.0f);
vba.Color<Float3>(0, 0) = Float3(0.0f, 1.0f, 0.0f);
vba.Color<Float3>(0, 1) = Float3(0.0f, 1.0f, 0.0f);
vba.Color<Float3>(0, 2) = Float3(0.0f, 1.0f, 0.0f);
vba.Color<Float3>(0, 3) = Float3(0.0f, 1.0f, 0.0f);
// Indices to be shared by all rectangles.
IndexBuffer* ibuffer = new0 IndexBuffer(6, sizeof(int));
int* indices = (int*)ibuffer->GetData();
indices[0] = 0; indices[1] = 1; indices[2] = 3;
indices[3] = 3; indices[4] = 1; indices[5] = 2;
// Effect to be shared by the first three rectangles.
VertexColor3Effect* effect = new0 VertexColor3Effect();
// rectangle 1
TriMesh* mesh = new0 TriMesh(vformat, vbuffer0, ibuffer);
mesh->SetEffectInstance(effect->CreateInstance());
mesh->LocalTransform.SetTranslate(APoint(+2.0f, -4.0f, 0.0f));
mScene->AttachChild(mesh);
// rectangle 2
mesh = new0 TriMesh(vformat, vbuffer1, ibuffer);
mesh->SetEffectInstance(effect->CreateInstance());
mesh->LocalTransform.SetTranslate(APoint(+2.0f, -4.0f, 0.0f));
mesh->LocalTransform.SetUniformScale(0.5f);
mScene->AttachChild(mesh);
// rectangle 3
mesh = new0 TriMesh(vformat, vbuffer0, ibuffer);
mesh->SetEffectInstance(effect->CreateInstance());
mesh->LocalTransform.SetTranslate(APoint(-2.0f, -4.0f, 0.0f));
mScene->AttachChild(mesh);
// rectangle 4
mesh = new0 TriMesh(vformat, vbuffer1, ibuffer);
mesh->LocalTransform.SetTranslate(APoint(-2.0f, -4.0f, 0.0f));
mesh->LocalTransform.SetUniformScale(0.5f);
mScene->AttachChild(mesh);
// Set up the polygon offset for rectangle 4.
effect = new0 VertexColor3Effect();
OffsetState* ostate = effect->GetOffsetState(0, 0);
ostate->FillEnabled = true;
ostate->Scale = -1.0f;
ostate->Bias = -2.0f;
mesh->SetEffectInstance(effect->CreateInstance());
}
//----------------------------------------------------------------------------
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