95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
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#include "common.h"
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//#link "common.c"
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#include "scrolling.h"
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//#link "scrolling.c"
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#include "sprites.h"
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//#link "sprites.c"
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#include <cbm_petscii_charmap.h>
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static void draw_cell(word ofs, byte x, byte y) {
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byte xx = x + origin_x;
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byte yy = y + origin_y;
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byte ch = xx ^ yy;
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hidbuf[ofs] = ch; // character
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colorbuf[ofs] = ch; // color
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}
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void scroll_draw_column(byte col) {
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byte y;
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word ofs = col;
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for (y=0; y<ROWS; y++) {
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draw_cell(ofs, col, y);
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ofs += COLS;
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}
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}
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void scroll_draw_row(byte row) {
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byte x;
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word ofs = row * COLS;
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for (x=0; x<COLS; x++) {
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draw_cell(ofs, x, row);
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++ofs;
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}
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}
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/*{w:24,h:21,bpp:1,brev:1}*/
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const char SPRITE1[3*21] = {
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0x80,0x7F,0x01,0x01,0xFF,0xC0,0x03,0xFF,0xE0,
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0x03,0xE7,0xE0,0x07,0xD9,0xF0,0x07,0xDF,0xF0,
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0x07,0xD9,0xF0,0x03,0xE7,0xE0,0x03,0xFF,0xE0,
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0x03,0xFF,0xE0,0x02,0xFF,0xA0,0x01,0x7F,0x40,
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0x01,0x3E,0x40,0x00,0x9C,0x80,0x00,0x9C,0x80,
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0x00,0x49,0x00,0x00,0x49,0x00,0x00,0x3E,0x00,
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0x00,0x3E,0x00,0x00,0x3E,0x00,0x80,0x1C,0x01
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};
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void main(void) {
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byte n = 0;
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clrscr();
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printf("\r\n\r\n\r\n Hello World!");
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printf("\r\n\r\n\r\n This is how we scroll");
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printf("\r\n\r\n\r\n But color RAM can't move");
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printf("\r\n\r\n\r\n So we have to use a temp buffer");
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printf("\r\n\r\n\r\n And copy it just in time");
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// setup scrolling library
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scroll_setup();
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VIC.bordercolor = 12;
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// setup sprite library and copy sprite to VIC bank
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sprite_clear();
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sprite_set_shapes(SPRITE1, 192, 1);
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// install the joystick driver
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joy_install (joy_static_stddrv);
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// infinite loop
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while (1) {
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static char speed = 1;
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// get joystick bits
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char joy = joy_read(0);
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// speed up scrolling while button pressed
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speed = JOY_BTN_1(joy) ? 2 : 1;
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// move sprite based on arrow keys
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if (JOY_LEFT(joy)) scroll_horiz(-speed);
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if (JOY_UP(joy)) scroll_vert(-speed);
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if (JOY_RIGHT(joy)) scroll_horiz(speed);
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if (JOY_DOWN(joy)) scroll_vert(speed);
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// animate sprite in shadow sprite ram
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sprite_draw(0, n++, 70, 192);
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sprite_draw(0, 172, 145, 192);
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// wait for end of frame
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wait_vblank();
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// update scroll registers
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// and swap screens if we must
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scroll_update();
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// then update sprite registers
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sprite_update(visbuf);
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}
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}
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