這是使用蓋莫游戲引擎2.1.2測試環(huán)境映射的demo
對opengl而言
環(huán)境映射主要就圍繞函數(shù)glTexEnv工作的
但是其實現(xiàn)起來不是那么容易
該測試例子源于2.1.1版本demo中的球面映射一例
增加的代碼為:
RefPtr<TexEnv> texenv = reflect->GetTexEnv();
texenv->SetEnvColor(Color::Blue);
texenv->SetMode(TEXTURE_ENV_MODE_BLEND);
texenv->SetLodBias(0.2f);
texenv->SetPointSpriteCoordReplace(true);
texenv->SetRGBScale(1.2f);
texenv->SetAlphaScale(0.8f);
texenv->SetCombineMode(TEXTURE_ENV_MODE_INTERPOLATE);
texenv->SetEnvSource0(TEXTURE_ENV_SOURCE_TEXTURE0);
texenv->SetEnvSource1(TEXTURE_ENV_SOURCE_TEXTURE1);
texenv->SetEnvSource2(TEXTURE_ENV_SOURCE_TEXTURE2);
環(huán)境映射的操作模式就是從紋理中獲取對應的環(huán)境映射指針并設置合適的參數(shù)數(shù)值
全demo源碼為:
/*!==========================================================================
*
* 蓋莫游戲引擎(GaiMo Game Engine)
*
* 版權(quán)所有 (C) 2009-2009 成都蓋莫軟件技術(shù)工作室 保留所有權(quán)利
* Copyright (C) 成都蓋莫軟件技術(shù)工作室. All Rights Reserved.
*
* 了解更多情況,請訪問 http://www.gaimo.net
****************************************************************************/
#include <GEngine/Gaimo.hpp>
using namespace std;
using namespace core;
int main(int argc, char **argv)
{
//! 初始化引擎設備并得到設備指針
RefPtr<Device> device = core::InitDevice("環(huán)境映射");
//! 得到引擎場景指針
RefPtr<SceneManager> scenemanager = device->GetSceneManager();
//! 得到引擎資源指針
RefPtr<ResourceManager> resourcemanager = device->GetResourceManager();
//! 獲取引擎紋理管理器指針
RefPtr<TextureManager> texturemanager = resourcemanager->GetTextureManager();
//! 獲取引擎圖形管理器
RefPtr<ImageManager> imagemanager = resourcemanager->GetImageManager();
//! 獲取引擎視頻驅(qū)動器
RefPtr<VideoDriver> videodriver = device->GetVideoDriver();
//! 得到圖形和其紋理
RefPtr<Image> image1 = imagemanager->CreateObject("background","..\\image//spheremap//tree.jpg");
RefPtr<Texture> background = texturemanager->CreateObject("background",image1);
background->Generate();
RefPtr<Image> image2 = imagemanager->CreateObject("reflect","..\\image//spheremap//tree1.jpg");
RefPtr<Texture> reflect = texturemanager->CreateSphereMap("reflect",image2);
RefPtr<TexEnv> texenv = reflect->GetTexEnv();
texenv->SetEnvColor(Color::Blue);
texenv->SetMode(TEXTURE_ENV_MODE_BLEND);
texenv->SetLodBias(0.2f);
texenv->SetPointSpriteCoordReplace(true);
texenv->SetRGBScale(1.2f);
texenv->SetAlphaScale(0.8f);
texenv->SetCombineMode(TEXTURE_ENV_MODE_INTERPOLATE);
texenv->SetEnvSource0(TEXTURE_ENV_SOURCE_TEXTURE0);
texenv->SetEnvSource1(TEXTURE_ENV_SOURCE_TEXTURE1);
texenv->SetEnvSource2(TEXTURE_ENV_SOURCE_TEXTURE2);
reflect->Generate();
//! 獲取全局攝像機,設置攝像機參數(shù)
core::RefPtr<core::Camera> camera = scenemanager->GetActiveCamera();
camera->SetPosition(Vector3f(0,0,30));
camera->SetView(Vector3f(0,0,0));
camera->SetDirection(Vector3f(0,1,0));
camera->SetViewPort(Recti(0,0,640,480));
camera->SetPerspective(50.0f,640.0f/480.0f,0.1f,300.0f);
videodriver->EnableCulling();
BEGIN_LOOP(device)
videodriver->SetClearBuffer(ENGINE_CLEAR_COLOR | ENGINE_CLEAR_DEPTH);
videodriver->SetClearColor(core::Color::Blue);
camera->Render();
background->AttachRenderTarget();
glBegin(GL_QUADS);
glNormal3f( 0.0f, 0.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-13.0f, -12.0f, 10.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 13.0f, -12.0f, 10.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 13.0f, 12.0f, 10.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-13.0f, 12.0f, 10.0f);
glEnd();
reflect->AttachRenderTarget();
videodriver->RenderSphere(12,32,32);
videodriver->RenderSphere(9,32,32);
videodriver->RenderSphere(6,32,32);
reflect->Destroy();
END_LOOP(device)
return 0;
}
當前測試例子設置環(huán)境映射模式為渲染模式
則其效果為:
再貼一次對應的無環(huán)境映射的圖片如下:
可以看出蓋莫游戲引擎一直在不斷完善ing.