S60 3rd Edition SDK for Symbian OS Example Applications Guide

Shadows.h

/*
* ==============================================================================
*  Name        : Shadows.h
*  Part of     : OpenGLEx / Shadows
*  Interface   : 
*  Description : 
*  Version     : 
*
*  Copyright (c) 2004-2006 Nokia Corporation.
*  This material, including documentation and any related 
*  computer programs, is protected by copyright controlled by 
*  Nokia Corporation.
* ==============================================================================
*/

#ifndef SHADOWS_H
#define SHADOWS_H


// INCLUDES
#include <e32base.h> // for CBase definition
#include <GLES/gl.h> // OpenGL ES header file

// MACROS
#define FRUSTUM_LEFT   -1.f     //left vertical clipping plane
#define FRUSTUM_RIGHT   1.f     //right vertical clipping plane
#define FRUSTUM_BOTTOM -1.f     //bottom horizontal clipping plane
#define FRUSTUM_TOP     1.f     //top horizontal clipping plane
#define FRUSTUM_NEAR    3.f     //near depth clipping plane
#define FRUSTUM_FAR  1000.f     //far depth clipping plane

// CLASS DECLARATION

/**
 * Class that does the actual OpenGL ES rendering.
 */
class CShadows : public CBase
    {
    public:  // Constructors and destructor
        
        /**
         * Factory method for creating a new CShadows object.
         */
        static CShadows* NewL( TUint aWidth, TUint aHeight);
        
        /**
         * Destructor. Does nothing.
         */
        virtual ~CShadows();

    public: // New functions
        
        /**
         * Initializes OpenGL ES, sets the vertex and color
         * arrays and pointers. Also selects the shading mode.
         */
        void AppInit( void );
        
        /**
         * Called upon application exit. Does nothing.
         */
        void AppExit( void );
      
        /**
         * Draws the ground plane.
         */
        void DrawPlane( void );
        
        /**
         * Draws the lamp.
         */
        void DrawLamp( void );
        
        /**
         * Draws the shadows.
         */
        void DrawShadowObject( void );
        
        /**
         * Draw the object.
         */
        void DrawObject( void );
        
        /**
         * Calculate proper shadow matrix.
         */
        void CalculateProjectionMatrix( void );
        
        /**
         * Renders one frame.
         * @param aFrame Number of the frame to be rendered.
         */
        void AppCycle( TInt aFrame );
        
        /**
         * Rotates light to left
         */
        void RotateLightLeft( void );
        
        /**
         * Rotates light to right
         */
        void RotateLightRight( void );    

        /**
         * Notifies that the screen size has dynamically changed during execution of
         * this program. Resets the viewport to this new size.
         * @param aWidth New width of the screen.
         * @param aHeight New height of the screen.
         */
        void SetScreenSize( TUint aWidth, TUint aHeight );

    protected:  // New functions
        
        /**
         * Standard constructor that must never Leave.
         * Stores the given screen width and height.
         * @param aWidth Width of the screen.
         * @param aHeight Height of the screen.
         */
        CShadows( TUint aWidth, TUint aHeight);
        
        /**
         * Second phase contructor. Does nothing.
         */
        void ConstructL( void );
    
    private:  // Data
        
        /** Width of the screen */
        TUint iScreenWidth;
        
        /** Height of the screen */
        TUint iScreenHeight;

        
        /** Radius of the light. */
        GLfloat iLightRadius;
        
        /** Angle of the light. */
        GLfloat iLightAngle;

        
        /** X coordinate of the light */
        GLfloat iLightPosX;
        
        /** Y coordinate of the light */
        GLfloat iLightPosY;
        
        /** Z coordinate of the light */
        GLfloat iLightPosZ;

        
        /** Light position. */
        GLfloat iLightPos[4];
        
        /** Shadow projection matrix. */
        GLfloat iShadowMat[16];
    
        
        /** Whether the light is rotated left each frame or not. */
        TBool iIsLightRotatedLeft;
        
        /** Whether the light is rotated right each frame or not. */
        TBool iIsLightRotatedRight;

    };


#endif
//  End of File

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© Nokia 2006