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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 "Terrains.h"
#include "TerrainEffect.h"
WM5_WINDOW_APPLICATION(Terrains);
//----------------------------------------------------------------------------
Terrains::Terrains ()
:
WindowApplication3("SampleGraphics/Terrains", 0, 0, 640, 480,
Float4(0.5f, 0.0f, 1.0f, 1.0f)),
mTextColor(1.0f, 1.0f, 1.0f, 1.0f)
{
Environment::InsertDirectory(ThePath + "Shaders/");
mHeightAboveTerrain = 20.0f;
}
//----------------------------------------------------------------------------
bool Terrains::OnInitialize ()
{
if (!WindowApplication3::OnInitialize())
{
return false;
}
// Set up the camera. Position the camera in the middle of page[0][0].
// Orient it to look diagonally across the terrain pages.
mCamera->SetFrustum(60.0f, GetAspectRatio(), 1.0f, 1500.0f);
APoint camPosition(64.0f, 64.0f, mHeightAboveTerrain);
AVector camDVector(Mathf::INV_SQRT_2, Mathf::INV_SQRT_2, 0.0f);
AVector camUVector(0.0f, 0.0f, 1.0f);
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(1.0f, 0.01f);
MoveForward();
return true;
}
//----------------------------------------------------------------------------
void Terrains::OnTerminate ()
{
mScene = 0;
mSkyDome = 0;
mTerrain = 0;
WindowApplication3::OnTerminate();
}
//----------------------------------------------------------------------------
void Terrains::OnIdle ()
{
MeasureTime();
APoint camPosition = mCamera->GetPosition();
float x = camPosition[0], y = camPosition[1];
if (MoveCamera())
{
// The sky dome moves with the camera so that it is always in view.
APoint skyPosition(x, y, 0.0f);
mSkyDome->LocalTransform.SetTranslate(skyPosition);
mSkyDome->Update();
// Update the active terrain pages.
mTerrain->OnCameraMotion();
mCuller.ComputeVisibleSet(mScene);
}
// Get the terrain height and normal vector and report it to the user.
float height = mTerrain->GetHeight(x, y);
AVector normal = mTerrain->GetNormal(x, y);
char message[512];
sprintf(message, "height = %f , normal = (%f,%f,%f)",
height, normal[0], normal[1], normal[2]);
if (mRenderer->PreDraw())
{
mRenderer->ClearBuffers();
mRenderer->Draw(mCuller.GetVisibleSet());
DrawFrameRate(8, GetHeight()-8, mTextColor);
mRenderer->Draw(128, GetHeight()-8, mTextColor, message);
mRenderer->PostDraw();
mRenderer->DisplayColorBuffer();
}
UpdateFrameCount();
}
//----------------------------------------------------------------------------
void Terrains::CreateScene ()
{
// Create the root of the scene.
mScene = new0 Node();
// Load and initialize the sky dome. It follows the camera.
std::string skyMeshName = Environment::GetPathR("SkyDomePNT2.wmvf");
Visual::PrimitiveType type;
VertexFormat* vformat;
VertexBuffer* vbuffer;
IndexBuffer* ibuffer;
Visual::LoadWMVF(skyMeshName, type, vformat, vbuffer, ibuffer);
mSkyDome = new0 TriMesh(vformat, vbuffer, ibuffer);
mScene->AttachChild(mSkyDome);
APoint skyPosition = mCamera->GetPosition();
skyPosition[2] = 0.0f;
mSkyDome->LocalTransform.SetTranslate(skyPosition);
mSkyDome->LocalTransform.SetUniformScale(mCamera->GetDMax());
Texture2DEffect* skyEffect = new0 Texture2DEffect(
Shader::SF_LINEAR_LINEAR, Shader::SC_REPEAT, Shader::SC_REPEAT);
std::string skyTextureName = Environment::GetPathR("SkyDome.wmtf");
Texture2D* skyTexture = Texture2D::LoadWMTF(skyTextureName);
skyTexture->GenerateMipmaps();
mSkyDome->SetEffectInstance(skyEffect->CreateInstance(skyTexture));
// Load the height field and create the terrain.
vformat = VertexFormat::Create(3,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 1);
// For lower-resolution terrain, change the paths to Height64/Color64 or
// Height32/Color32.
std::string heightName = ThePath + "Data/Height128/height";
std::string colorName = ThePath + "Data/Color128/color";
mTerrain = new0 Terrain(heightName, vformat, mCamera);
mScene->AttachChild(mTerrain);
// The effect that is shared across all pages.
std::string effectFile =
Environment::GetPathR("BaseMulDetailFogExpSqr.wmfx");
TerrainEffect* terrainEffect = new0 TerrainEffect(effectFile);
std::string detailName = Environment::GetPathR("Detail.wmtf");
Texture2D* detailTexture = Texture2D::LoadWMTF(detailName);
detailTexture->GenerateMipmaps();
ShaderFloat* fogColorDensity = new0 ShaderFloat(1);
(*fogColorDensity)[0] = 0.5686f;
(*fogColorDensity)[1] = 0.7255f;
(*fogColorDensity)[2] = 0.8353f;
(*fogColorDensity)[3] = 0.0015f;
// Attach an effect to each page. Preload all resources to video memory.
// This will avoid frame rate stalls when new terrain pages are
// encountered as the camera moves.
const int numRows = mTerrain->GetRowQuantity();
const int numCols = mTerrain->GetColQuantity();
for (int r = 0; r < numRows; ++r)
{
for (int c = 0; c < numCols; ++c)
{
TerrainPage* page = mTerrain->GetPage(r, c);
char suffix[32];
sprintf(suffix, ".%d.%d.wmtf", r, c);
std::string colorTextureName = colorName + std::string(suffix);
Texture2D* colorTexture = Texture2D::LoadWMTF(colorTextureName);
colorTexture->GenerateMipmaps();
VisualEffectInstance* instance = terrainEffect->CreateInstance(
colorTexture, detailTexture, fogColorDensity);
page->SetEffectInstance(instance);
mRenderer->Bind(page->GetVertexBuffer());
mRenderer->Bind(page->GetVertexFormat());
mRenderer->Bind(page->GetIndexBuffer());
mRenderer->Bind(colorTexture);
}
}
}
//----------------------------------------------------------------------------
void Terrains::MoveForward ()
{
WindowApplication3::MoveForward();
APoint camPosition = mCamera->GetPosition();
float height = mTerrain->GetHeight(camPosition[0], camPosition[1]);
camPosition[2] = height + mHeightAboveTerrain;
mCamera->SetPosition(camPosition);
}
//----------------------------------------------------------------------------
void Terrains::MoveBackward ()
{
WindowApplication3::MoveBackward();
APoint camPosition = mCamera->GetPosition();
float height = mTerrain->GetHeight(camPosition[0], camPosition[1]);
camPosition[2] = height + mHeightAboveTerrain;
mCamera->SetPosition(camPosition);
}
//----------------------------------------------------------------------------
void Terrains::MoveDown ()
{
if (mHeightAboveTerrain >= mTrnSpeed)
{
mHeightAboveTerrain -= mTrnSpeed;
}
APoint camPosition = mCamera->GetPosition();
float height = mTerrain->GetHeight(camPosition[0], camPosition[1]);
camPosition[2] = height + mHeightAboveTerrain;
mCamera->SetPosition(camPosition);
}
//----------------------------------------------------------------------------
void Terrains::MoveUp ()
{
mHeightAboveTerrain += mTrnSpeed;
APoint camPosition = mCamera->GetPosition();
float height = mTerrain->GetHeight(camPosition[0], camPosition[1]);
camPosition[2] = height + mHeightAboveTerrain;
mCamera->SetPosition(camPosition);
}
//----------------------------------------------------------------------------
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