mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-12-29 11:31:42 +00:00
129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
|
|
#include "common.h"
|
|
//#link "common.c"
|
|
|
|
#include "scrolling.h"
|
|
//#link "scrolling.c"
|
|
|
|
#include "sprites.h"
|
|
//#link "sprites.c"
|
|
|
|
#include <cbm_petscii_charmap.h>
|
|
|
|
static void draw_cell(word ofs, byte x, byte y) {
|
|
byte xx = x + origin_x;
|
|
byte yy = y + origin_y;
|
|
byte ch = xx ^ yy;
|
|
hidbuf[ofs] = ch; // character
|
|
colorbuf[ofs] = ch; // color
|
|
}
|
|
|
|
void scroll_draw_column(byte col) {
|
|
byte y;
|
|
word ofs = col;
|
|
for (y=0; y<ROWS; y++) {
|
|
draw_cell(ofs, col, y);
|
|
ofs += COLS;
|
|
}
|
|
}
|
|
|
|
void scroll_draw_row(byte row) {
|
|
byte x;
|
|
word ofs = row * COLS;
|
|
for (x=0; x<COLS; x++) {
|
|
draw_cell(ofs, x, row);
|
|
++ofs;
|
|
}
|
|
}
|
|
|
|
/*{w:24,h:21,bpp:1,brev:1}*/
|
|
const char SPRITE1[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
|
|
};
|
|
|
|
int playerx = 0;
|
|
int playery = 0;
|
|
int camerax = 0;
|
|
int cameray = 0;
|
|
|
|
void update_player() {
|
|
sprite_draw(0, playerx-camerax+160, playery-cameray+140, 192);
|
|
}
|
|
|
|
void camera_follow(byte moving) {
|
|
int dx, dy;
|
|
dx = camerax - playerx;
|
|
dy = cameray - playery;
|
|
if (moving && abs(dx) < 32 && abs(dy) < 32) return;
|
|
dx >>= 4;
|
|
dy >>= 4;
|
|
if (dx) {
|
|
if (dx > 8) dx = 8;
|
|
else if (dx < -8) dx = -8;
|
|
camerax -= dx;
|
|
}
|
|
if (dy) {
|
|
if (dy > 8) dy = 8;
|
|
else if (dy < -8) dy = -8;
|
|
cameray -= dy;
|
|
}
|
|
scroll_xy(dx, dy);
|
|
}
|
|
|
|
void main(void) {
|
|
|
|
clrscr();
|
|
printf("\r\n\r\n\r\n Hello World!");
|
|
printf("\r\n\r\n\r\n Use the joystick to move");
|
|
printf("\r\n\r\n\r\n And the camera will follow");
|
|
|
|
// setup scrolling library
|
|
scroll_setup();
|
|
VIC.bordercolor = 12;
|
|
|
|
// setup sprite library and copy sprite to VIC bank
|
|
sprite_clear();
|
|
sprite_set_shapes(SPRITE1, 192, 1);
|
|
sprshad.spr_color[0] = 13;
|
|
|
|
// install the joystick driver
|
|
joy_install (joy_static_stddrv);
|
|
|
|
// infinite loop
|
|
while (1) {
|
|
static char speed;
|
|
static char joy;
|
|
static bool slowframe = false;
|
|
// get joystick bits
|
|
joy = joy_read(0);
|
|
// speed up scrolling while button pressed
|
|
speed = JOY_BTN_1(joy) ? 3 : 1;
|
|
// if we copied screen memory last frame,
|
|
// double speed of player for this frame
|
|
if (slowframe) speed *= 2;
|
|
// move sprite based on arrow keys
|
|
if (JOY_LEFT(joy)) playerx -= speed;
|
|
if (JOY_RIGHT(joy)) playerx += speed;
|
|
if (JOY_UP(joy)) playery -= speed;
|
|
if (JOY_DOWN(joy)) playery += speed;
|
|
// move the camera?
|
|
camera_follow(joy);
|
|
slowframe = swap_needed;
|
|
// animate sprite in shadow sprite ram
|
|
update_player();
|
|
// wait for end of frame
|
|
waitvsync();
|
|
// then update sprite registers
|
|
sprite_update(visbuf);
|
|
// update scroll registers
|
|
// and swap screens if we must
|
|
scroll_update();
|
|
}
|
|
}
|