sl@0: // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: 
sl@0: #include "model.h"
sl@0: #include "geometrystructs.h"
sl@0: #include "egldefs.h"
sl@0: #include "eglerror.h"
sl@0: 
sl@0: #include <e32math.h>
sl@0: 
sl@0: 
sl@0: const TInt KMoonPositionCount = 100;
sl@0: const TInt KSunPositionCount = 100;
sl@0: 
sl@0: const TInt KSunOrbitRadius = 2000; //heliocentric
sl@0: const TInt KMoonOrbitRadius = 100;
sl@0: const TInt KModelDistanceFromCamera = 200;
sl@0: 
sl@0: const TInt KMinResolution = 5;
sl@0: const TInt KMaxResolution = 50;
sl@0: const TInt KDefaultResolution = 50;
sl@0: 
sl@0: const TInt KSunRadius=100;
sl@0: const TInt KPlanetRadius=50;
sl@0: const TInt KMoonRadius = 10;
sl@0: 
sl@0: _LIT(KRed, "red");
sl@0: _LIT(KGreen, "green");
sl@0: _LIT(KBlue, "blue");
sl@0: _LIT(KBlack, "black");
sl@0: 
sl@0: 
sl@0: CModel* CModel::NewL(EGLDisplay aDisplay, EGLSurface aSurface)
sl@0:     {
sl@0:     TPtrC defaultColor(KBlack);
sl@0:     return NewL(aDisplay, aSurface, defaultColor);
sl@0:     }
sl@0: 
sl@0: CModel* CModel::NewL(EGLDisplay aDisplay, EGLSurface aSurface, TPtrC aBackgroundColor)
sl@0:     {
sl@0:     CModel* self = new(ELeave) CModel(aDisplay, aSurface);
sl@0:     CleanupStack::PushL(self);
sl@0:     self->ConstructL(aBackgroundColor);
sl@0:     CleanupStack::Pop(self);
sl@0:     return self;
sl@0:     }
sl@0: 
sl@0: void CModel::PrecalculateOrbitL(TInt aOrbitingDistance, RArray<Vertex3F>& aVertices, TInt aPositionCount, TReal aAngle)
sl@0:     {
sl@0:     //fghCircleTable allocates for sin and cos tables, 
sl@0:     //so we must not fail to append vertices to the array,
sl@0:     //so we must reserve all the space we need.
sl@0:     aVertices.ReserveL(aPositionCount);
sl@0:     //precalculate the positions of the sun
sl@0:     TReal32 *sint1,*cost1;
sl@0:     User::LeaveIfError(fghCircleTable(&sint1,&cost1, aPositionCount));
sl@0:     
sl@0:     TReal radians = aAngle*(KPi/180);
sl@0:     TReal32 cosA = cos(radians);
sl@0:     TReal32 sinA = sin(radians);
sl@0:     
sl@0:     TReal32 x,y = 0;
sl@0:     TReal32 cosCalc = aOrbitingDistance * cosA;
sl@0:     TReal32 sinCalc = aOrbitingDistance * sinA;
sl@0:     for(TInt i = 0; i < aPositionCount;  i++)
sl@0:         {
sl@0:         x = cost1[i] * cosCalc;
sl@0:         y = cost1[i] * sinCalc;
sl@0: 
sl@0:         Vertex3F v(x,y, sint1[i]*aOrbitingDistance);
sl@0:         User::LeaveIfError(aVertices.Append(v));
sl@0:         }
sl@0:     delete[] sint1;
sl@0:     delete[] cost1;
sl@0:     }
sl@0: 
sl@0: void CModel::ConstructL(TPtrC aBackgroundColor)
sl@0:     {
sl@0:     iResolution=KDefaultResolution;
sl@0: 
sl@0:     CSolidSphere* newSun = CSolidSphere::NewLC(KSunRadius, iResolution, iResolution);
sl@0:     CSolidSphere* newPlanet = CSolidSphere::NewLC(KPlanetRadius, iResolution, iResolution);
sl@0:     CSolidSphere* newMoon = CSolidSphere::NewLC(KMoonRadius, iResolution, iResolution);
sl@0:     SetShapes(newSun, newPlanet, newMoon);
sl@0:     CleanupStack::Pop(3, newSun);
sl@0:     
sl@0:     PrecalculateOrbitL(KSunOrbitRadius, iSunPositions, KSunPositionCount, 135);
sl@0:     PrecalculateOrbitL(KMoonOrbitRadius, iMoonPositions, KMoonPositionCount, 23.5);
sl@0:     if(aBackgroundColor == KRed)
sl@0:         {
sl@0:         iBackgroundColor[ERed] = 0.5;
sl@0:         }
sl@0:     else if (aBackgroundColor == KGreen)
sl@0:         {
sl@0:         iBackgroundColor[EGreen] = 0.5;
sl@0:         }
sl@0:     else if (aBackgroundColor == KBlue)
sl@0:         {
sl@0:         iBackgroundColor[EBlue] = 0.5;
sl@0:         }
sl@0:     }
sl@0: 
sl@0: CModel::CModel(EGLDisplay aDisplay, EGLSurface aSurface)
sl@0:     :iDisplay(aDisplay), iSurface(aSurface)
sl@0:     {
sl@0:     }
sl@0: 
sl@0: CModel::~CModel()
sl@0:     {
sl@0:     delete iSun;
sl@0:     delete iPlanet;
sl@0:     delete iMoon;
sl@0:     iSunPositions.Close();
sl@0:     iMoonPositions.Close();
sl@0:     }
sl@0: 
sl@0: void CModel::SetShapes(CSolidSphere* aSun, CSolidSphere* aPlanet, CSolidSphere* aMoon)
sl@0:     {
sl@0:     delete iSun;
sl@0:     iSun = aSun;
sl@0:     
sl@0:     delete iPlanet;
sl@0:     iPlanet = aPlanet;
sl@0:     
sl@0:     delete iMoon;
sl@0:     iMoon = aMoon;
sl@0:     }
sl@0: 
sl@0: void CModel::DrawToBuffer(TInt aTime) const
sl@0:     {
sl@0:     InitialiseFrame();
sl@0:     DrawModelData(aTime);
sl@0:     }
sl@0: 
sl@0: void CModel::InitialiseFrame() const
sl@0:     {
sl@0:     glEnable(GL_CULL_FACE);
sl@0:     glEnable(GL_DEPTH_TEST); 
sl@0:     glEnable(GL_COLOR_ARRAY);
sl@0:     glEnable(GL_LIGHTING);
sl@0:     glEnable(GL_LIGHT0);
sl@0:     glEnableClientState(GL_VERTEX_ARRAY);
sl@0:     glEnableClientState(GL_NORMAL_ARRAY);
sl@0:     
sl@0:     glClearColor(iBackgroundColor[ERed], iBackgroundColor[EGreen], iBackgroundColor[EBlue], iBackgroundColor[EAlpha]); 
sl@0:     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
sl@0:     
sl@0:     glCullFace(GL_FRONT);   
sl@0:     glShadeModel (GL_SMOOTH);
sl@0: 
sl@0:     // Set the projection parameters
sl@0:     glMatrixMode(GL_PROJECTION);
sl@0:     glLoadIdentity();
sl@0:     
sl@0:     EGLint height;
sl@0:     if(!eglQuerySurface(iDisplay, iSurface, EGL_HEIGHT, &height))
sl@0:         {
sl@0:         ProcessEglError();
sl@0:         }
sl@0:     EGLint width;
sl@0:         if(!eglQuerySurface(iDisplay, iSurface, EGL_WIDTH, &width))
sl@0:             {
sl@0:             ProcessEglError();
sl@0:             }
sl@0:         
sl@0:     GLfloat widthf = width;
sl@0:     GLfloat heightf = height;
sl@0:     GLfloat aspectRatio = widthf/heightf;
sl@0:     glFrustumf( -(aspectRatio*KFrustumHeight), (aspectRatio*KFrustumHeight), 
sl@0:                 -KFrustumHeight, KFrustumHeight, 
sl@0:                 KFrustumNear, KFrustumFar);
sl@0:     }
sl@0: 
sl@0: void CModel::DrawModelData(TInt aTime) const
sl@0:     {
sl@0:     //draw a light source where the sun is
sl@0:     glMatrixMode(GL_MODELVIEW);
sl@0:     glLoadIdentity();
sl@0:     GLfloat sun_color[] = { 1.0, 1.0, 0.5333, 1 };
sl@0:     Vertex3F vSun = iSunPositions[aTime%KSunPositionCount];
sl@0:     vSun.iZ-=KModelDistanceFromCamera;
sl@0:     GLfloat light0position[] = {vSun.iX, vSun.iY, vSun.iZ, 1.0 };
sl@0:     glLightfv(GL_LIGHT0, GL_POSITION, light0position);
sl@0:     glLightfv(GL_LIGHT0, GL_SPECULAR, sun_color);  
sl@0:     
sl@0:     //draw the sun
sl@0:     glMatrixMode(GL_MODELVIEW);
sl@0:     glLoadIdentity();
sl@0:     //this is obviously wrong: I don't understand why the z-coord for the 
sl@0:     //sun needs to be the negation of the z-coord for the light source position,
sl@0:     //in order for the light to appear to come from the sun!
sl@0:     glTranslatef(vSun.iX, vSun.iY, -vSun.iZ);
sl@0:         
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, sun_color);
sl@0:         
sl@0:     iSun->Draw();
sl@0:     //draw the planet
sl@0:     glMatrixMode(GL_MODELVIEW);
sl@0:     glLoadIdentity();
sl@0:     glTranslatef(0, 0, -KModelDistanceFromCamera);
sl@0:     
sl@0:     GLfloat mat_planet_color[] = { 0.459, 0.679, 0.8, 1 };
sl@0:     GLfloat mat_planet_shininess[] = { 30.0 };
sl@0:     GLfloat mat_no_emission[] = {0, 0, 0, 0};
sl@0: 
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, mat_planet_color);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_planet_color);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_planet_color);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_planet_shininess);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, mat_no_emission);
sl@0:     iPlanet->Draw();
sl@0:     
sl@0:     //draw the moon
sl@0:     glMatrixMode(GL_MODELVIEW);
sl@0:     glLoadIdentity();
sl@0:     Vertex3F vMoon = iMoonPositions[aTime%KMoonPositionCount];
sl@0:     vMoon.iZ-=KModelDistanceFromCamera;
sl@0:     glTranslatef(vMoon.iX, vMoon.iY, vMoon.iZ);
sl@0:     
sl@0:     GLfloat mat_moon_specular[] = { 0.5, 0.5, 0.5, 1.0 };
sl@0:     GLfloat mat_moon_shininess[] = { 500.0 };
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, mat_moon_specular);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_moon_specular);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_moon_specular);
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_moon_shininess);  
sl@0:     glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, mat_no_emission);
sl@0:     
sl@0:     iMoon->Draw();
sl@0:     }
sl@0: 
sl@0: void CModel::SetResolutionL(TInt aResolution)
sl@0:     {
sl@0:     aResolution *= 5;
sl@0:     if(aResolution > KMaxResolution)
sl@0:         {
sl@0:         aResolution = KMaxResolution;
sl@0:         }
sl@0:     if(aResolution < KMinResolution)
sl@0:         {
sl@0:         aResolution = KMinResolution;
sl@0:         }
sl@0:     iResolution = aResolution;
sl@0:     CSolidSphere* newSun = CSolidSphere::NewLC(KSunRadius, iResolution, iResolution);
sl@0:     CSolidSphere* newPlanet = CSolidSphere::NewLC(KPlanetRadius, iResolution, iResolution);
sl@0:     CSolidSphere* newMoon = CSolidSphere::NewLC(KMoonRadius, iResolution, iResolution);
sl@0:     SetShapes(newSun, newPlanet, newMoon);  
sl@0:     CleanupStack::Pop(3, newSun);
sl@0:     }
sl@0: