gwj / graphics_tutorial · Commits

Commit 6819eba7591e99a6bbdf1cdc0a4cd03ad2016d9c

Authored by Grzegorz Jabłoński
1 parent 9a9693c1

Shooting triggered by space

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Showing 2 changed files with 73 additions and 0 deletions
04-shoot/cannon.c 0 → 100644
  View file @6819eba
  1 +#include "primlib.h"
  2 +#include <stdlib.h>
  3 +#include <unistd.h>
  4 +
  5 +int main(int argc, char *argv[]) {
  6 + if (gfx_init())
  7 + exit(3);
  8 +
  9 + gfx_filledRect(0, 0, gfx_screenWidth() - 1, gfx_screenHeight() - 1, BLUE);
  10 + gfx_filledCircle(gfx_screenWidth() / 2, gfx_screenHeight(), 100, YELLOW);
  11 + gfx_line(gfx_screenWidth() / 2, gfx_screenHeight() , gfx_screenWidth() / 2, gfx_screenHeight() - 150, YELLOW);
  12 + gfx_updateScreen();
  13 +
  14 + double angle = 90.0 * (M_PI/180.0);
  15 +
  16 + double bullet_distance;
  17 + int is_shooting = 0;
  18 + double fire_angle;
  19 + while(1)
  20 + {
  21 + double delta_angle= 2.0 * (M_PI/180.0);
  22 + int x1 = 150 * cos(angle-delta_angle);
  23 + int y1 = 150 * sin(angle-delta_angle);
  24 + int x2 = 150 * cos(angle+delta_angle);
  25 + int y2 = 150 * sin(angle+delta_angle);
  26 + gfx_filledRect(0, 0, gfx_screenWidth() - 1, gfx_screenHeight() - 1, BLUE);
  27 + gfx_filledCircle(gfx_screenWidth() / 2, gfx_screenHeight(), 100, YELLOW);
  28 + gfx_filledTriangle(gfx_screenWidth() / 2, gfx_screenHeight() , gfx_screenWidth() / 2 + x1, gfx_screenHeight() - y1,
  29 + gfx_screenWidth() / 2 + x2, gfx_screenHeight() - y2, YELLOW);
  30 +
  31 + if(is_shooting)
  32 + {
  33 + int x_bullet = bullet_distance * cos(fire_angle);
  34 + int y_bullet = bullet_distance * sin(fire_angle);
  35 +
  36 + gfx_filledCircle(gfx_screenWidth() / 2 + x_bullet, gfx_screenHeight() - y_bullet, 10, RED);
  37 + }
  38 +
  39 + gfx_updateScreen();
  40 +
  41 + if(is_shooting)
  42 + bullet_distance += 1.0;
  43 +
  44 + if(gfx_isKeyDown(SDLK_RIGHT))
  45 + angle -= 1.0 * (M_PI/180.0);
  46 + if(gfx_isKeyDown(SDLK_LEFT))
  47 + angle += 1.0 * (M_PI/180.0);
  48 + if(gfx_isKeyDown(SDLK_SPACE))
  49 + {
  50 + is_shooting = 1;
  51 + bullet_distance = 170.0;
  52 + fire_angle = angle;
  53 + }
  54 + SDL_Delay(100);
  55 + };
  56 + return 0;
  57 +}
... ...
04-shoot/makefile 0 → 100755
  View file @6819eba
  1 +TARGET=cannon
  2 +
  3 +all: $(TARGET)
  4 +
  5 +%.o:%.c
  6 + gcc -g -I.. -Wall -pedantic `sdl2-config --cflags` -c $< -o $@
  7 +
  8 +%: %.c ../primlib.o %.c
  9 + gcc -g -I.. -Wall -pedantic `sdl2-config --cflags` ../primlib.o $< -o $@ -lSDL2_gfx `sdl2-config --libs` -lm
  10 +
  11 +../primlib.o: ../primlib.c ../primlib.h
  12 +
  13 +$(TARGET): $(TARGET).c ../primlib.h
  14 +
  15 +clean:
  16 + -rm $(TARGET)
0 17 \ No newline at end of file
... ...