main.cpp

光滑质点无网格法SPH并行计算程序

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// 
// =============================================================================
//                       Minimalist OpenGL Environment
// =============================================================================
//
// Copyright 2007 Balazs Domonkos
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

//
// Simple Application data preloader

// mingle.h should be included before all other
// OpenGL headers
#include <mingle.h>
using namespace MinGLE;

#include <GL/glut.h>
#include <iostream>

class SceneRenderer : public WindowListener {
	protected:
		double mScale;
		bool mRender;

	public:
		SceneRenderer() :
			mScale(0.3), mRender(true)
		{
		}
	
		double *getScalePtr() {
			return &mScale;
		}

		bool *getRenderPtr() {
			return &mRender;
		}

    protected:
		virtual bool onRender() {
	    	if(mRender) glutSolidTeapot(mScale);
	    	
	    	// Enable the next window listener to render
	    	return false;
		}
};

class GuiDemo : public GuiSheet {
	protected:
		Font *mFont;
		TextField *text;

	public:
		GuiDemo(double *scale, bool *render)
		{
			mFont = new Font("zekton.xml");
			TextField::setDefaultFont(mFont);

			Panel *panel = new Panel("myPanel");
			panel->setColor(0.1, 0.0, 0.0);
			panel->setHeightAbs(64);
			add(panel);
			
			text = new TextField("myText", "??? FPS");
			text->setColor(0.2, 0.3, 0.6);
			text->setPositionAbs(8, 8);
			text->setWidthRel(0.5);
			panel->add(text);
			
			CheckBox *checkBox = new CheckBox("myCheckBox", true);
			checkBox->setLeftRel(0.5);
			checkBox->setTopAbs(8);
			checkBox->setUserData(render);
			panel->add(checkBox);
			
			Slider *mSlider = new Slider("mySlider");
			mSlider->setLeftRel(0.5);
			mSlider->setTopAbs(32);
			mSlider->setWidthAbs(200);
			mSlider->setUserData(scale);
			panel->add(mSlider);
		}
		
		~GuiDemo() {
			delete mFont;
		}

		// This method is called before rendering the gui
		virtual void onUpdate() {
			text->setText(StringUtils::toString(mWindow->getFrameRate(), 2) + " FPS");
		}
};

class Preloader : public WindowListener, Process {
	protected:
		SceneRenderer *mSceneRenderer;

	public:
		Preloader(SceneRenderer *sceneRenderer) :
			mSceneRenderer(sceneRenderer) 
		{
		}
	
	protected:
    	virtual void onRegistered() {
		    glMatrixMode(GL_PROJECTION);
		    gluPerspective(90.0, (double) mWindow->getWidth() / mWindow->getHeight(), 0.01, 100.0);
		    glMatrixMode(GL_MODELVIEW);
			gluLookAt(1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

			glColor4f(1.0, 1.0, 1.0, 0.9);

    		// Start the thread
    		start();
    	}

		virtual bool onRender() {
			// Check load finish
			if(isFinished()) {
				switchSceneRenderer();
				return true;
			}
			
			// Render "hourglass"
		    glMatrixMode(GL_MODELVIEW);
	    	glPushMatrix();
	    	glRotatef(360.0*mStatus, 0.0, 1.0, 0.0);

	    	glutSolidTeapot(0.25);

			//glEnable(GL_BLEND);	// TODO
			glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
			glScalef(1.0, mStatus, 1.0);
	    	glutSolidCube(0.7);
			glDisable(GL_BLEND);

	    	glPopMatrix();
			
			return false;
		}
		
		virtual void process() {
			while(mStatus < 1.0) {
				Thread::sleep(0.05);
				mStatus += 0.01;
			}
		}
		
		void switchSceneRenderer() {
			Window *win = mWindow;

		    // Detach this renderer 
			mWindow->removeWindowListener(this);

			// Register the scene renderer
			win->registerWindowListener(mSceneRenderer);

			// Add navigator
			win->registerWindowListener(new ExaminerNavigator());

			// Register gui sheet
			// Note that the order of the rendering is:
			// (ApplicationKeyHandler) -> SceneRenderer -> (ExaminerNavigator) -> GuiSheet
			// but the order of input handling is reversed:
			// GuiSheet -> ExaminerNavigator -> SceneRenderer -> ApplicationKeyHandler
			GuiDemo *guiDemo = new GuiDemo(mSceneRenderer->getScalePtr(), mSceneRenderer->getRenderPtr());
			win->registerWindowListener(guiDemo);
			
			// Kick the window (TODO)
			win->setSize(win->getWidth(), win->getHeight()+1);

    		win->setRenderMode(WindowAttributes::RENDER_WHEN_IDLE);
		}
};

int main(int argc, char **argv) {

	try {

    	// Initialize rendering system
    	System::initialize(&argc, argv);

    	// Create window
    	Window *win = System::createWindow();
    	win->setRenderMode(WindowAttributes::RENDER_ON_TIMER);
    	win->setDesiredFPS(10);

		// Add keyhandler
		win->registerWindowListener(new ApplicationKeyHandler());

    	// Create scene renderer, but do not register it
    	SceneRenderer *sceneRenderer = new SceneRenderer();

		// Create preloader for the scene renderer and register it
		Preloader *preloader = new Preloader(sceneRenderer);
    	win->registerWindowListener(preloader);

    	// Setup OpenGL
    	glEnable(GL_DEPTH_TEST);
    	glShadeModel(GL_SMOOTH);
    
    	GLfloat position[] = { 3.0f, 3.0f, 3.0f, 1.0f };
    	GLfloat diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
    	GLfloat specular[] = {1.0f, 1.0f, 1.0f , 1.0f};
    	glEnable(GL_LIGHTING);
    	glEnable(GL_LIGHT0);
    	glLightfv(GL_LIGHT0, GL_POSITION, position);
    	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
    	glLightfv(GL_LIGHT0, GL_SPECULAR, specular);

		GLfloat material_ambient[] = {0.25f, 0.25f, 0.25f};
		GLfloat material_diffuse[] = {0.90f, 0.90f, 0.90f};
		GLfloat material_specular[] = {0.90f, 0.90f, 0.90f};
		GLfloat material_shininess = 25.0f;

		glMaterialfv(GL_FRONT, GL_AMBIENT, material_ambient);
		glMaterialfv(GL_FRONT, GL_DIFFUSE, material_diffuse);
		glMaterialfv(GL_FRONT, GL_SPECULAR, material_specular);
		glMaterialf(GL_FRONT, GL_SHININESS, material_shininess);
		
    	// Enter the event handing loop
    	System::enterMainLoop();
    	
	} catch(const Exception& e) {
		std::cerr << "Error: " << e.mDescription << " (Thrown in " << e.mFile << ':'
			<< e.mMethod << " line " << e.mLine << ')' << std::endl;
	}

    return 0;
}