![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Graphical demo for the LPC4088 Experiment Base Board with one of the Display Expansion Kits. This demo shows a rotating 3D cube with and without textures.
Diff: CubeDemo.h
- Revision:
- 0:c828045bbe69
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CubeDemo.h Fri Oct 03 12:48:37 2014 +0000 @@ -0,0 +1,146 @@ + +#ifndef CUBEDEMO_H +#define CUBEDEMO_H + +#include "Graphics.h" +#include "GFXFb.h" + +#include "EaLcdBoardGPIO.h" + +class CubeDemo { +public: + + /** Set the address of the frame buffer to use. + * + * It is the content of the frame buffer that is shown on the + * display. All the drawing on the frame buffer can be done + * 'offline' and whenever it should be shown this function + * can be called with the address of the offline frame buffer. + * + * @param pFrameBuf Pointer to the frame buffer, which must be + * 3 times as big as the frame size (for tripple + * buffering). + * dispWidth The width of the display (in pixels). + * dispHeight The height of the display (in pixels). + * loops Number of loops in the demo code. + * delayMs Delay in milliseconds between schreen updates. + * + * @returns + * none + */ + CubeDemo(uint8_t *pFrameBuf, uint16_t dispWidth, uint16_t dispHeight); + ~CubeDemo(); + + void run(EaLcdBoardGPIO& lcdBoard, uint32_t loops, uint32_t delayMs); + + +private: + enum Constants { + BACKGROUND_COLOR = BLACK, + SMALL_CIRCLE_FRONT_COLOR = WHITE, + + LENS = 256, + X_OFFSET = 240, //120, + Y_OFFSET = 130 + }; + + typedef struct + { + uint32_t w; + uint32_t h; + void *pixels; + } Surface_t; + + typedef struct + { + int x; + int y; + } Coord2D_t; + + typedef struct + { + int32_t x; //normal 3d coords + int32_t y; + int32_t z; + int32_t xr; //rotated coords + int32_t yr; + int32_t zr; + int32_t scrx; //translated and projected 3d points + int32_t scry; + } tPoint3d; + + typedef struct + { + int32_t p1; //vertex + int32_t p2; + int32_t p3; + int32_t u1; //texture coords + int32_t v1; + int32_t u2; + int32_t v2; + int32_t u3; + int32_t v3; + } tPoly; + + typedef struct + { + int32_t x; + int32_t y; + int32_t z; + } tVector; + + int32_t windowX; + int32_t windowY; + uint16_t *pFrmBuf; + uint16_t *pFrmBuf1; + uint16_t *pFrmBuf2; + uint16_t *pFrmBuf3; + + Graphics graphics; + + Surface_t sourcePicture1; + Surface_t sourcePicture2; + Surface_t activeFrame; + + int32_t rx; + int32_t ry; + int32_t rx_; + int32_t ry_; + uint8_t mode; + + tPoint3d cubeModel[8]; + tPoly cubePoly[12]; + + uint32_t camX; + uint32_t camY; + uint32_t camZ; + + void plot4points( int32_t cx, int32_t cy, int32_t x, int32_t y, int16_t color, int32_t Filled ); + void plot8points( int32_t cx, int32_t cy, int32_t x, int32_t y, int16_t color, int32_t Filled ); + void put_circle( int32_t cx, int32_t cy, int16_t color, int32_t radius, int32_t Filled ); + int32_t swim_abs(int32_t v1); + void put_line(int32_t x1, int32_t y1, int32_t x2, int32_t y2, int16_t color); + + int32_t sgn(int32_t val) const; + short icosine(short x) const; + short isine(short x) const; + short _cos(short y) const; + short _sin(short y) const; + + void TriangleProjectFast(Surface_t *SrcRP_p, Surface_t *DstRP_p, Coord2D_t *SrcCoords_p, Coord2D_t *DstCoords_p); + void CpPixel16Fast(int xSrc, int ySrc, int x, int y, Surface_t *SrcRP_p, Surface_t *DstRP_p); + + void drawCubeZ(Surface_t *pSourcePicture, uint8_t shades); + void rotateAndProject(uint16_t rotX, uint16_t rotY, uint16_t rotZ); + void createCubeModel(uint32_t radius); + + unsigned decodePNG(const unsigned char* pIn, size_t insize, Surface_t* pOut); + + + void initialize(); + void render(uint32_t idx); +}; + + +#endif /* CUBEDEMO_H */ +