CubeDemo.h

00001 
00002 #ifndef CUBEDEMO_H
00003 #define CUBEDEMO_H
00004 
00005 #include "Graphics.h"
00006 #include "GFXFb.h"
00007 
00008 class CubeDemo {
00009 public:
00010 
00011     /** Set the address of the frame buffer to use.
00012      *
00013      *  It is the content of the frame buffer that is shown on the
00014      *  display. All the drawing on the frame buffer can be done
00015      *  'offline' and whenever it should be shown this function
00016      *  can be called with the address of the offline frame buffer.
00017      *
00018      *  @param pFrameBuf  Pointer to the frame buffer, which must be
00019      *                    3 times as big as the frame size (for tripple
00020      *                    buffering).
00021      *         dispWidth  The width of the display (in pixels).
00022      *         dispHeight The height of the display (in pixels).
00023      *         loops      Number of loops in the demo code.
00024      *         delayMs    Delay in milliseconds between schreen updates.
00025      *
00026      *  @returns
00027      *       none
00028      */
00029     CubeDemo(uint8_t *pFrameBuf, uint16_t dispWidth, uint16_t dispHeight);
00030     ~CubeDemo();
00031     
00032     void run(uint32_t loops, uint32_t delayMs);
00033 
00034 
00035 private:
00036     enum Constants {
00037         BACKGROUND_COLOR = BLACK,
00038         SMALL_CIRCLE_FRONT_COLOR = WHITE,
00039 
00040         LENS     = 256,
00041         X_OFFSET = 240, //120,
00042         Y_OFFSET = 130
00043     };
00044 
00045     typedef struct
00046     {
00047         uint32_t  w;
00048         uint32_t  h;
00049         void *pixels;
00050     } Surface_t;
00051 
00052     typedef struct
00053     {
00054         int x;
00055         int y;
00056     } Coord2D_t;
00057 
00058     typedef struct 
00059     { 
00060       int32_t x;  //normal 3d coords 
00061       int32_t y;
00062       int32_t z; 
00063       int32_t xr; //rotated coords
00064       int32_t yr;
00065       int32_t zr;
00066       int32_t scrx; //translated and projected 3d points
00067       int32_t scry;
00068     } tPoint3d; 
00069     
00070     typedef struct 
00071     {
00072       int32_t p1;  //vertex
00073       int32_t p2;
00074       int32_t p3;
00075       int32_t u1;  //texture coords
00076       int32_t v1;
00077       int32_t u2;
00078       int32_t v2;
00079       int32_t u3;
00080       int32_t v3;  
00081     } tPoly;
00082     
00083     typedef struct 
00084     {
00085       int32_t x;
00086       int32_t y;
00087       int32_t z;
00088     } tVector;
00089     
00090     int32_t windowX;
00091     int32_t windowY;
00092     uint16_t *pFrmBuf;
00093     uint16_t *pFrmBuf1;
00094     uint16_t *pFrmBuf2;
00095     uint16_t *pFrmBuf3;
00096     
00097     Graphics graphics;
00098     
00099     Surface_t sourcePicture1;
00100     Surface_t sourcePicture2;
00101     Surface_t activeFrame;
00102 
00103     int32_t rx;
00104     int32_t ry;
00105     int32_t rx_;
00106     int32_t ry_;
00107     uint8_t mode;
00108 
00109     tPoint3d cubeModel[8];
00110     tPoly    cubePoly[12];
00111 
00112     uint32_t camX;
00113     uint32_t camY;
00114     uint32_t camZ;
00115     
00116     void plot4points( int32_t cx, int32_t cy, int32_t x, int32_t y, int16_t color, int32_t Filled );
00117     void plot8points( int32_t cx, int32_t cy, int32_t x, int32_t y, int16_t color, int32_t Filled );
00118     void put_circle( int32_t cx, int32_t cy, int16_t color, int32_t radius, int32_t Filled );
00119     int32_t swim_abs(int32_t v1);
00120     void put_line(int32_t x1, int32_t y1, int32_t x2, int32_t y2, int16_t color);
00121     
00122     int32_t sgn(int32_t val) const;
00123     short icosine(short x) const;
00124     short isine(short x) const;
00125     short _cos(short y) const;
00126     short _sin(short y) const;
00127 
00128     void TriangleProjectFast(Surface_t *SrcRP_p, Surface_t *DstRP_p, Coord2D_t *SrcCoords_p,  Coord2D_t *DstCoords_p);
00129     void CpPixel16Fast(int xSrc, int ySrc, int x, int y, Surface_t *SrcRP_p, Surface_t *DstRP_p);
00130 
00131     void drawCubeZ(Surface_t *pSourcePicture, uint8_t shades);
00132     void rotateAndProject(uint16_t rotX, uint16_t rotY, uint16_t rotZ);
00133     void createCubeModel(uint32_t radius);
00134 
00135     unsigned decodePNG(const unsigned char* pIn, size_t insize, Surface_t* pOut);
00136 
00137 
00138     void initialize();
00139     void render(uint32_t idx);
00140 };
00141 
00142 
00143 #endif /* CUBEDEMO_H */
00144