mirror of
https://github.com/deater/dos33fsprogs.git
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291 lines
5.6 KiB
C
291 lines
5.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <math.h>
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#include "gr-sim.h"
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#include "tfv_utils.h"
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#include "tfv_zp.h"
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#include "tfv_sprites.h"
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static unsigned char flying_map[16][16]= {
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{0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,},
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{0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,},
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{0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,},
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{0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,},
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{4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,},
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{4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,},
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{4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,},
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{4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,},
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{8,8,8,8,9,9,9,9,10,10,10,10,11,11,11,11,},
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{8,8,8,8,9,9,9,9,10,10,10,10,11,11,11,11,},
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{8,8,8,8,9,9,9,9,10,10,10,10,11,11,11,11,},
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{8,8,8,8,9,9,9,9,10,10,10,10,11,11,11,11,},
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{12,12,12,12,13,13,13,13,14,14,14,14,15,15,15,15,},
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{12,12,12,12,13,13,13,13,14,14,14,14,15,15,15,15,},
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{12,12,12,12,13,13,13,13,14,14,14,14,15,15,15,15,},
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{12,12,12,12,13,13,13,13,14,14,14,14,15,15,15,15,},
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};
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/* Ship Sprites */
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unsigned char ship_shadow[]={
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0x5,0x3,
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0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0xaa,0x00,0x00,
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0x00,0x00,0xaa,0x00,0x00,
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};
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unsigned char ship_forward[]={
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0x5,0x3,
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0x00,0x00,0x77,0x00,0x00,
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0x50,0x55,0x77,0x55,0x50,
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0x01,0x00,0x07,0x00,0x01,
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};
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unsigned char ship_right[]={
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0x5,0x3,
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0x50,0x00,0x70,0x77,0x00,
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0x01,0x55,0x77,0x55,0x50,
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0x00,0x77,0x07,0x00,0x15,
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};
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unsigned char ship_left[]={
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0x5,0x3,
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0x00,0x77,0x70,0x00,0x50,
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0x50,0x55,0x77,0x55,0x01,
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0x15,0x00,0x07,0x77,0x00,
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};
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static int tile_w=16,tile_h=16;
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/* http://www.helixsoft.nl/articles/circle/sincos.htm */
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static double space_z=2.5; // height of the camera above the plane
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static int horizon=-2; // number of pixels line 0 is below the horizon
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static double scale_x=20, scale_y=20;
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// scale of space coordinates to screen coordinates
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static double bmp_w=40, bmp_h=40;
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//void mode_7 (BITMAP *bmp, BITMAP *tile, fixed angle, fixed cx, fixed cy, MODE_7_PARAMS params)
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double BETA=-0.6;
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void draw_background_mode7(double angle, double cx, double cy) {
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// current screen position
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int screen_x, screen_y;
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// the distance and horizontal scale of the line we are drawing
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double distance, horizontal_scale;
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// masks to make sure we don't read pixels outside the tile
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int mask_x = (tile_w - 1);
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int mask_y = (tile_h - 1);
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// step for points in space between two pixels on a horizontal line
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double line_dx, line_dy;
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// current space position
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double space_x, space_y;
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clear_top(0);
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for (screen_y = 6; screen_y < bmp_h; screen_y++) {
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// first calculate the distance of the line we are drawing
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distance = (space_z * scale_y) / (screen_y + horizon);
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// then calculate the horizontal scale, or the distance between
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// space points on this horizontal line
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horizontal_scale = (distance / scale_x);
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// calculate the dx and dy of points in space when we step
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// through all points on this line
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line_dx = -sin(angle) * horizontal_scale;
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line_dy = cos(angle) * horizontal_scale;
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// calculate the starting position
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space_x = cx + (distance * cos(angle)) - bmp_w/2 * line_dx;
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space_y = cy + (distance * sin(angle)) - bmp_w/2 * line_dy;
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space_x+=(BETA*space_z*cos(angle));
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space_y+=(BETA*space_z*sin(angle));
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// go through all points in this screen line
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for (screen_x = 0; screen_x < bmp_w; screen_x++) {
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// get a pixel from the tile and put it on the screen
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color_equals(flying_map[(int)space_x & mask_x]
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[(int)space_y&mask_y]);
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basic_plot(screen_x,screen_y);
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// advance to the next position in space
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space_x += line_dx;
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space_y += line_dy;
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}
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}
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}
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int flying(void) {
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int i;
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unsigned char ch;
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int xx,yy;
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int turning=0;
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double flyx=0,flyy=0;
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double our_angle=0.0;
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double dy,dx,speed=0;
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/************************************************/
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/* Flying */
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/************************************************/
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gr();
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xx=17; yy=26;
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color_equals(COLOR_BLACK);
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color_equals(COLOR_MEDIUMBLUE);
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for(i=0;i<20;i++) {
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hlin(1, 0, 40, i);
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}
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color_equals(COLOR_DARKBLUE);
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for(i=20;i<48;i++) {
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hlin(1, 0, 40, i);
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}
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while(1) {
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ch=grsim_input();
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if ((ch=='q') || (ch==27)) break;
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if (ch=='g') {
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BETA+=0.1;
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printf("Horizon=%lf\n",BETA);
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}
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if (ch=='h') {
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BETA-=0.1;
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printf("Horizon=%lf\n",BETA);
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}
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if (ch=='s') {
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scale_x++;
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scale_y++;
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printf("Scale=%lf\n",scale_x);
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}
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if ((ch=='i') || (ch==APPLE_UP)) {
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if (yy>16) {
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yy-=2;
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space_z+=1;
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}
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printf("Z=%lf\n",space_z);
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}
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if ((ch=='m') || (ch==APPLE_DOWN)) {
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if (yy<30) {
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yy+=2;
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space_z-=1;
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}
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printf("Z=%lf\n",space_z);
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}
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if ((ch=='j') || (ch==APPLE_LEFT)) {
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if (turning>0) {
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turning=0;
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}
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else {
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turning=-20;
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our_angle-=(6.28/32.0);
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if (our_angle<0.0) our_angle+=6.28;
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}
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// printf("Angle %lf\n",our_angle);
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}
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if ((ch=='k') || (ch==APPLE_RIGHT)) {
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if (turning<0) {
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turning=0;
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}
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else {
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turning=20;
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our_angle+=(6.28/32.0);
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if (our_angle>6.28) our_angle-=6.28;
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}
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}
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if (ch=='z') {
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speed+=0.05;
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}
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if (ch=='x') {
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speed-=0.05;
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}
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if (ch==' ') {
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speed=0;
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}
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{
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dx = speed * cos (our_angle);
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dy = speed * sin (our_angle);
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flyx += dx;
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flyy += dy;
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}
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// gr_copy(0x800,0x400);
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draw_background_mode7(our_angle, flyx, flyy);
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grsim_put_sprite_page(0,ship_shadow,xx,30);
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if (turning==0) grsim_put_sprite_page(0,ship_forward,xx,yy);
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if (turning<0) {
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grsim_put_sprite_page(0,ship_left,xx,yy);
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turning++;
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}
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if (turning>0) {
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grsim_put_sprite_page(0,ship_right,xx,yy);
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turning--;
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}
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grsim_update();
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usleep(20000);
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}
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return 0;
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}
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int main(int argc, char **argv) {
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grsim_init();
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home();
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gr();
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flying();
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return 0;
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}
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