Chris Dick / Mbed 2 deprecated Gameduino_Scroll_demo

Scroll demo for the Gameduino

Dependencies:   Gameduino mbed

main.cpp@1:e67cae7d6015, 2012-12-21 (annotated)

Committer:
TheChrisyd
Date:
Fri Dec 21 14:05:08 2012 +0000
Revision:
1:e67cae7d6015
Parent:
0:714c22289f04 
updated Gameduino library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TheChrisyd 0:714c22289f04 1 #include "mbed.h"
TheChrisyd 0:714c22289f04 2 #include "GD.h"
TheChrisyd 0:714c22289f04 3
TheChrisyd 0:714c22289f04 4 #include "platformer.h"
TheChrisyd 0:714c22289f04 5 #include "shield.h"
TheChrisyd 0:714c22289f04 6
TheChrisyd 0:714c22289f04 7 GDClass GD(ARD_MOSI, ARD_MISO, ARD_SCK, ARD_D9, USBTX, USBRX) ;
TheChrisyd 0:714c22289f04 8 int atxy(int x, int y) {
TheChrisyd 0:714c22289f04 9 return (y << 6) + x;
TheChrisyd 0:714c22289f04 10 }
TheChrisyd 0:714c22289f04 11
TheChrisyd 0:714c22289f04 12 // copy a (w,h) rectangle from the source image (x,y) into picture RAM
TheChrisyd 0:714c22289f04 13 static void rect(unsigned int dst, byte x, byte y, byte w, byte h) {
TheChrisyd 0:714c22289f04 14 PROGMEM prog_uchar *src = platformer_pic + (16 * y) + x;
TheChrisyd 0:714c22289f04 15 while (h--) {
TheChrisyd 0:714c22289f04 16 GD.copy(dst, src, w);
TheChrisyd 0:714c22289f04 17 dst += 64;
TheChrisyd 0:714c22289f04 18 src += 16;
TheChrisyd 0:714c22289f04 19 }
TheChrisyd 0:714c22289f04 20 }
TheChrisyd 0:714c22289f04 21
TheChrisyd 0:714c22289f04 22 //#define SINGLE(x, y) (platformer_pic[(y) * 16 + (x)]))
TheChrisyd 0:714c22289f04 23
TheChrisyd 0:714c22289f04 24 byte SINGLE(int x, int y) {
TheChrisyd 0:714c22289f04 25 y = (y * 16) + x;
TheChrisyd 0:714c22289f04 26 return platformer_pic[y];
TheChrisyd 0:714c22289f04 27 }
TheChrisyd 0:714c22289f04 28 // Draw a random 8-character wide background column at picture RAM dst
TheChrisyd 0:714c22289f04 29
TheChrisyd 0:714c22289f04 30 void draw_column(unsigned int dst) {
TheChrisyd 0:714c22289f04 31 byte y;
TheChrisyd 0:714c22289f04 32 byte x;
TheChrisyd 0:714c22289f04 33 byte ch;
TheChrisyd 0:714c22289f04 34
TheChrisyd 0:714c22289f04 35 // Clouds and sky, 11 lines
TheChrisyd 0:714c22289f04 36 rect(dst, 0, 0, 8, 11);
TheChrisyd 0:714c22289f04 37
TheChrisyd 0:714c22289f04 38 // bottom plain sky, lines 11-28
TheChrisyd 0:714c22289f04 39 ch = SINGLE(0,11);
TheChrisyd 0:714c22289f04 40 for (y = 11; y < 28; y++)
TheChrisyd 0:714c22289f04 41 GD.fill(dst + (y << 6), ch, 8);
TheChrisyd 0:714c22289f04 42
TheChrisyd 0:714c22289f04 43 // randomly choose between background elements
TheChrisyd 0:714c22289f04 44 byte what = rand()%256;
TheChrisyd 0:714c22289f04 45 if (what < 10) {
TheChrisyd 0:714c22289f04 46 // big mushroom thing
TheChrisyd 0:714c22289f04 47 y = (rand()%7) + 11;
TheChrisyd 0:714c22289f04 48 rect(dst + atxy(0, y), 8, 18, 8, 9);
TheChrisyd 0:714c22289f04 49 y += 9;
TheChrisyd 0:714c22289f04 50 byte i = 0;
TheChrisyd 0:714c22289f04 51 while (y < 28) {
TheChrisyd 0:714c22289f04 52 rect(dst + atxy(0, y), 8, 23 + (i & 3), 8, 1);
TheChrisyd 0:714c22289f04 53 i++, y++;
TheChrisyd 0:714c22289f04 54 }
TheChrisyd 0:714c22289f04 55 } else if (what < 32) {
TheChrisyd 0:714c22289f04 56 // pair of green bollards
TheChrisyd 0:714c22289f04 57 for (x = 0; x < 8; x += 4) {
TheChrisyd 0:714c22289f04 58 y = (rand()%5) + 20;
TheChrisyd 0:714c22289f04 59 rect(dst + atxy(x, y), 6, 11, 4, 3);
TheChrisyd 0:714c22289f04 60 y += 3;
TheChrisyd 0:714c22289f04 61 while (y < 28) {
TheChrisyd 0:714c22289f04 62 rect(dst + atxy(x, y), 6, 13, 4, 1);
TheChrisyd 0:714c22289f04 63 y++;
TheChrisyd 0:714c22289f04 64 }
TheChrisyd 0:714c22289f04 65 }
TheChrisyd 0:714c22289f04 66 } else {
TheChrisyd 0:714c22289f04 67 // hills
TheChrisyd 0:714c22289f04 68 for (x = 0; x < 8; x += 2) {
TheChrisyd 0:714c22289f04 69 y = (rand()%5) + 20;
TheChrisyd 0:714c22289f04 70 rect(dst + atxy(x, y), 4, 11, 2, 3);
TheChrisyd 0:714c22289f04 71 y += 3;
TheChrisyd 0:714c22289f04 72 while (y < 28) {
TheChrisyd 0:714c22289f04 73 rect(dst + atxy(x, y), 4, 13, 2, 1);
TheChrisyd 0:714c22289f04 74 y++;
TheChrisyd 0:714c22289f04 75 }
TheChrisyd 0:714c22289f04 76 }
TheChrisyd 0:714c22289f04 77 // foreground blocks
TheChrisyd 0:714c22289f04 78 x = rand()%5;
TheChrisyd 0:714c22289f04 79 y = (rand()%13) + 11;
TheChrisyd 0:714c22289f04 80 byte blk = rand()%4;
TheChrisyd 0:714c22289f04 81 rect(dst + atxy(x, y), blk * 4, 14, 4, 3);
TheChrisyd 0:714c22289f04 82 y += 3;
TheChrisyd 0:714c22289f04 83 while (y < 28) {
TheChrisyd 0:714c22289f04 84 rect(dst + atxy(x, y), blk * 4, 17, 4, 1);
TheChrisyd 0:714c22289f04 85 y++;
TheChrisyd 0:714c22289f04 86 }
TheChrisyd 0:714c22289f04 87 }
TheChrisyd 0:714c22289f04 88
TheChrisyd 0:714c22289f04 89 // Ground, line 28
TheChrisyd 0:714c22289f04 90 ch = SINGLE(0,18);
TheChrisyd 0:714c22289f04 91 GD.fill(dst + atxy(0,28), ch, 8);
TheChrisyd 0:714c22289f04 92 // Underground, line 29
TheChrisyd 0:714c22289f04 93 ch = SINGLE(0,19);
TheChrisyd 0:714c22289f04 94 GD.fill(dst + atxy(0,29), ch, 8);
TheChrisyd 0:714c22289f04 95 }
TheChrisyd 0:714c22289f04 96
TheChrisyd 0:714c22289f04 97 unsigned long xscroll;
TheChrisyd 0:714c22289f04 98
TheChrisyd 0:714c22289f04 99 void setup() {
TheChrisyd 0:714c22289f04 100 GD.begin();
TheChrisyd 0:714c22289f04 101 GD.copy(RAM_CHR, platformer_chr, sizeof(platformer_chr));
TheChrisyd 0:714c22289f04 102 GD.copy(RAM_PAL, platformer_pal, sizeof(platformer_pal));
TheChrisyd 0:714c22289f04 103
TheChrisyd 0:714c22289f04 104 int i;
TheChrisyd 0:714c22289f04 105 for (i = 0; i < 256; i++)
TheChrisyd 0:714c22289f04 106 GD.sprite(i, 400, 400, 0, 0, 0);
TheChrisyd 0:714c22289f04 107
TheChrisyd 0:714c22289f04 108 for (i = 0; i < 64; i += 8) {
TheChrisyd 0:714c22289f04 109 draw_column(atxy(i, 0));
TheChrisyd 0:714c22289f04 110 }
TheChrisyd 0:714c22289f04 111 // Serial.begin(1000000);
TheChrisyd 0:714c22289f04 112 }
TheChrisyd 0:714c22289f04 113
TheChrisyd 0:714c22289f04 114 int main() {
TheChrisyd 0:714c22289f04 115 setup();
TheChrisyd 0:714c22289f04 116 while (1) {
TheChrisyd 0:714c22289f04 117 xscroll++;
TheChrisyd 0:714c22289f04 118 if ((xscroll & 63) == 0) {
TheChrisyd 0:714c22289f04 119 // figure out where to draw the 64-pixel draw_column
TheChrisyd 0:714c22289f04 120 // offscreen_pixel is the pixel x draw_column that is offscreen...
TheChrisyd 0:714c22289f04 121 int offscreen_pixel = ((xscroll + (7 * 64)) & 511);
TheChrisyd 0:714c22289f04 122 // offscreen_ch is the character address
TheChrisyd 0:714c22289f04 123 byte offscreen_ch = (offscreen_pixel >> 3);
TheChrisyd 0:714c22289f04 124 draw_column(atxy(offscreen_ch, 0));
TheChrisyd 0:714c22289f04 125 }
TheChrisyd 0:714c22289f04 126 GD.waitvblank();
TheChrisyd 0:714c22289f04 127 GD.wr16(SCROLL_X, xscroll);
TheChrisyd 0:714c22289f04 128 }
TheChrisyd 0:714c22289f04 129 }