mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-25 18:33:11 +00:00
95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
// ported from
|
|
// https://odensskjegg.home.blog/2018/12/29/recreating-the-commodore-64-user-guide-code-samples-in-cc65-part-three-sprites/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <conio.h>
|
|
#include <peekpoke.h>
|
|
#include <c64.h>
|
|
#include <joystick.h>
|
|
|
|
/*{w:24,h:21,bpp:1,brev:1}*/
|
|
const char sprite[3*21] = {
|
|
0x00,0x7F,0x00,0x01,0xFF,0xC0,0x03,0xFF,0xE0,
|
|
0x03,0xE7,0xE0,0x07,0xD9,0xF0,0x07,0xDF,0xF0,
|
|
0x07,0xD9,0xF0,0x03,0xE7,0xE0,0x03,0xFF,0xE0,
|
|
0x03,0xFF,0xE0,0x02,0xFF,0xA0,0x01,0x7F,0x40,
|
|
0x01,0x3E,0x40,0x00,0x9C,0x80,0x00,0x9C,0x80,
|
|
0x00,0x49,0x00,0x00,0x49,0x00,0x00,0x3E,0x00,
|
|
0x00,0x3E,0x00,0x00,0x3E,0x00,0x00,0x1C,0x00
|
|
};
|
|
|
|
/*{w:12,h:21,bpp:2,brev:1}*/
|
|
const char spritemc[3*21] = {
|
|
0x00,0xFF,0xC0,0x03,0xFF,0xF0,0x0F,0xFF,0xFC,
|
|
0x0F,0xFB,0xFC,0x0F,0xEE,0xFC,0x0F,0xEF,0xFC,
|
|
0x0F,0xEE,0xFC,0x0F,0xFB,0xFC,0x0F,0xFF,0xFC,
|
|
0x09,0xFF,0xD8,0x08,0x7F,0x48,0x08,0x1D,0x08,
|
|
0x02,0x0C,0x20,0x02,0x0C,0x20,0x02,0x0C,0x20,
|
|
0x00,0x8C,0x80,0x00,0x8C,0x80,0x00,0x55,0x40,
|
|
0x00,0x77,0x40,0x00,0x5D,0x40,0x00,0x15,0x00
|
|
};
|
|
|
|
// Raster wait with line argument
|
|
void rasterWait(unsigned char line) {
|
|
while (VIC.rasterline < line) ;
|
|
}
|
|
|
|
int main (void)
|
|
{
|
|
int n;
|
|
int x,y;
|
|
char bgcoll;
|
|
// install the joystick driver
|
|
joy_install (joy_static_stddrv);
|
|
// set background color
|
|
VIC.bgcolor0 = 3;
|
|
// clear interrupts to avoid glitching
|
|
__asm__("SEI");
|
|
// set sprite bitmap data
|
|
for (n = 0 ; n < sizeof(sprite) ; n++) {
|
|
POKE(0x340 + n, sprite[n]);
|
|
POKE(0x380 + n, spritemc[n]);
|
|
}
|
|
// enable 1st and 2nd sprite
|
|
VIC.spr_ena = 0x03;
|
|
VIC.spr_mcolor = 0x02;
|
|
// set colors
|
|
VIC.spr_mcolor0 = 4;
|
|
VIC.spr_mcolor1 = 7;
|
|
// 2x zoom 1st sprite
|
|
VIC.spr_exp_x = 0x01;
|
|
VIC.spr_exp_y = 0x01;
|
|
// set address of sprite data
|
|
POKE(0x7f8, 13);
|
|
POKE(0x7f9, 14);
|
|
// set initial x/y positions
|
|
x = 160;
|
|
y = 128;
|
|
// loop
|
|
while (1) {
|
|
// get joystick bits
|
|
char joy = joy_read(0);
|
|
// move sprite based on arrow keys
|
|
if (JOY_LEFT(joy)) --x;
|
|
if (JOY_UP(joy)) --y;
|
|
if (JOY_RIGHT(joy)) ++x;
|
|
if (JOY_DOWN(joy)) ++y;
|
|
// set VIC registers based on position
|
|
VIC.spr0_x = x;
|
|
VIC.spr0_y = y-32;
|
|
VIC.spr1_x = x;
|
|
VIC.spr1_y = y+32;
|
|
VIC.spr_hi_x = (x & 256) ? 1 : 0;
|
|
// change color when we collide with background
|
|
bgcoll = VIC.spr_bg_coll;
|
|
VIC.spr0_color = (bgcoll & 1) ? 10 : 0;
|
|
VIC.spr1_color = (bgcoll & 2) ? 10 : 0;
|
|
// wait for end of frame
|
|
rasterWait(255);
|
|
}
|
|
// uninstall joystick driver (not really necessary)
|
|
joy_uninstall();
|
|
return EXIT_SUCCESS;
|
|
}
|