首先上代码吧
个人感觉写的很清爽
/*!==========================================================================
*
* 盖莫游戏引擎(GaiMo Game Engine)
*
* 版权所有 (C) 2009-2009 成都盖莫软件技术工作室 保留所有权利
* Copyright (C) 成都盖莫软件技术工作室. All Rights Reserved.
*
* 了解更多情况,请访问 http://www.gaimo.net
****************************************************************************/
//! 本demo测试引擎渲染到纹理功能
#include <iostream>
#include <GEngine/Header_Config.hpp>
using namespace std;
using namespace core;
#define FRAME_NUMBER 12
//! 定义图形纹理指针
RefPtr<core::Texture> texture_ptr[FRAME_NUMBER];
//! 渲染到纹理指针
RefPtr<Renderable> rendertotexture;
core::TextDesc* text = NULL;
Matrix4f mat;
float pos[] = {0,0,0};
float length[] = {16,16,16};
void CreateTexture();
void InitCamera();
void Render();
int main(int argc, char *argv[])
{
//! 窗体描述符
ScreenDesc desc;
desc.name_ = "RenderToTextureTest";
//! 生成窗体
RefPtr<Screen> screen = CreateScreen(desc);
//! 生成纹理
CreateTexture();
//! 初始化摄像机
InitCamera();
while(screen->IsOpen())
{
Render();
}
DestroyScreen();
return EXIT_SUCCESS;
}
//! 构造纹理
void CreateTexture()
{
//! 载入资源包
GLOBAL_FILESYSTEM_PTR->RegisterPackage("..\\package\\logo.zip");
RefPtr<core::ReadFile> imagefile;
RefPtr<Image> image[FRAME_NUMBER];
for(int i = 0;i < FRAME_NUMBER ;i++)
{
std::string name = ToString<int>(i);
imagefile = GLOBAL_FILESYSTEM_PTR->GetRead("logo.jpg");
image[i] = GLOBAL_IMAGEMANAGER_PTR->CreateImage(name,imagefile);
}
//! 反色
image[0]->GetInvertImage();
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(0),image[0]);
//! 水平翻转
image[1]->FlipImage(Image::IMAGE_FLIP_X);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(1),image[1]);
//! 竖直翻转
image[2]->FlipImage(Image::IMAGE_FLIP_Y);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(2),image[2]);
//! Gamma调整
image[3]->AdjustGamma(0.4);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(3),image[3]);
//! 亮度调整
image[4]->AdjustBrightness(0.4);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(4),image[4]);
//! 对比度调整
image[5]->AdjustContrast(0.6);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(5),image[5]);
//! 翻转
image[6]->FlipImage(Image::IMAGE_FLIP_XY);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(6),image[6]);
//! 旋转
image[7]->RotatedImage(Image::IMAGE_ROTATE_90);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(7),image[7]);
//! Gamma调整
image[8]->AdjustGamma(0.1);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(8),image[8]);
//! 亮度调整
image[9]->AdjustBrightness(0.8);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(9),image[9]);
//! 对比度调整
image[10]->AdjustContrast(0.3);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(10),image[10]);
GLOBAL_TEXTUREMANAGER_PTR->CreateTexture2(ToString<int>(11),image[11]);
for(int i = 0; i < FRAME_NUMBER; i++)
{
//! 纹理构建
GLOBAL_TEXTUREMANAGER_PTR->GetObject(ToString<int>(i))->Generate();
}
text = new core::TextDesc("..\\package\\accid.ttf",12,0,0,3,Color::Cyan);
text->SetText(engine_wstring(L"maker:gaimosoft,ccsdu2004@yahoo.com.cn"));
//! 获取渲染到纹理指针
rendertotexture = GLOBAL_RENDERER_PTR->GetRenderToTexture(640,480,GL_RGBA,GL_FLOAT);
glEnable(GL_DEPTH_TEST);
}
void InitCamera()
{
RefPtr<Camera> orthocamera = GLOBAL_CAMERAMANAGER_PTR->CreateCamera("orthocamera");
orthocamera->SetOrtho(0,640,480,0,-1.2,0.8);
RefPtr<Camera> camera = GLOBAL_CAMERAMANAGER_PTR->GetActiveCamera();
camera->GetViewPort()->Render();
camera->SetPerspective(45.0f,640.0f/480.0f,1.0f,600.0f);
camera->SetPosition(Vector3f(20,20,20));
camera->SetView(Vector3f());
camera->ApplayProjectMatrix();
}
void RenderTexture()
{
std::string texturename;
for(int i = 0; i < FRAME_NUMBER; i++)
{
texturename = ToString<int>(i);
GLOBAL_TEXTUREMANAGER_PTR->GetObject(texturename)->AttachRenderTarget();
UI_Brush::RenderTexture((i%4)*160,(i/4)*160,160,160);
}
}
//! 处理鼠标响应
void MouseCheck()
{
if(GLOBAL_INPUT_PTR->IsPressedKey(KEY_F1))
{
mat*=mat.Rotate((rand()%200)/900.0f,1,0,0);
}
else if(GLOBAL_INPUT_PTR->IsPressedKey(KEY_F2))
{
mat*=mat.Rotate((rand()%200)/900.0f,0,1,0);
}
else if(GLOBAL_INPUT_PTR->IsPressedKey(KEY_F3))
{
mat*=mat.Rotate((rand()%200)/900.0f,0,0,1);
}
}
void RenderText()
{
UI_Brush::PreRender();
static int offset = 0;
text->Render(Rectf(offset,460,400,20));
offset ++;
if(offset >= 600)
offset = -500;
UI_Brush::PostRender();
}
void RenderToTexture()
{
rendertotexture->BeginRender();
GLOBAL_RENDERER_PTR->Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GLOBAL_CAMERAMANAGER_PTR->GetObject("orthocamera")->ApplayProjectMatrix();
RenderTexture();
RenderText();
rendertotexture->AfterRender();
}
void RenderToScreen()
{
GLOBAL_RENDERER_PTR->Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GLOBAL_CAMERAMANAGER_PTR->GetActiveCamera()->ApplayProjectMatrix();
GLOBAL_CAMERAMANAGER_PTR->GetActiveCamera()->ApplayViewMatrix();
GLOBAL_RENDERER_PTR->DrawCube(pos,mat.ptr(),length);
}
void Render()
{
MouseCheck();
RenderToTexture();
RenderToScreen();
}
基本步骤就是生成窗体
初始化摄像机
生成纹理
渲染到纹理
渲染到窗体
完了
图图如下:
似乎我比较喜欢贴立方体啊 呵呵
