gwj / graphics_tutorial · Commits

Commit 7165abda29a8911f202caa3e0a246d6baa4bb7aa

Authored by Grzegorz Jabłoński
1 parent 75b87b36

Multiple targets

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Showing 2 changed files with 191 additions and 0 deletions
06-multiple_targets/cannon.c 0 → 100644
  View file @7165abd
  1 +
  2 +#include "primlib.h"
  3 +#include <math.h>
  4 +#include <stdlib.h>
  5 +
  6 +struct target {
  7 + int x;
  8 + int y;
  9 + int speed_x;
  10 + int is_explosion;
  11 + int explosion_counter; // ile razy wyswietlalismy eksplozje
  12 + int color;
  13 +};
  14 +
  15 +// Draw explosion with the center at coordinates (x,y)
  16 +void drawExplosion(int x, int y, float scaling) {
  17 + int x_triangle = x;
  18 + int y_triangle = y;
  19 +
  20 + gfx_filledTriangle(x_triangle - 7 * scaling, y_triangle - 7 * scaling,
  21 + x_triangle + 7 * scaling, y_triangle + 7 * scaling,
  22 + x_triangle + 22 * scaling, y_triangle - 22 * scaling, RED);
  23 + gfx_filledTriangle(x_triangle - 7 * scaling, y_triangle - 7 * scaling,
  24 + x_triangle + 7 * scaling, y_triangle + 7 * scaling,
  25 + x_triangle - 22 * scaling, y_triangle + 22 * scaling, RED);
  26 + gfx_filledTriangle(x_triangle - 7 * scaling, y_triangle + 7 * scaling,
  27 + x_triangle + 7 * scaling, y_triangle - 7 * scaling,
  28 + x_triangle - 22 * scaling, y_triangle - 22 * scaling, RED);
  29 + gfx_filledTriangle(x_triangle - 7 * scaling, y_triangle + 7 * scaling,
  30 + x_triangle + 7 * scaling, y_triangle - 7 * scaling,
  31 + x_triangle + 22 * scaling, y_triangle + 22 * scaling, RED);
  32 +
  33 + gfx_filledTriangle(x_triangle - 13 * scaling, y_triangle,
  34 + x_triangle + 13 * scaling, y_triangle, x_triangle,
  35 + y_triangle - 35 * scaling, RED);
  36 + gfx_filledTriangle(x_triangle - 13 * scaling, y_triangle,
  37 + x_triangle + 13 * scaling, y_triangle, x_triangle,
  38 + y_triangle + 35 * scaling, RED);
  39 + gfx_filledTriangle(x_triangle, y_triangle - 13 * scaling, x_triangle,
  40 + y_triangle + 13 * scaling, x_triangle - 35 * scaling,
  41 + y_triangle, RED);
  42 + gfx_filledTriangle(x_triangle, y_triangle - 13 * scaling, x_triangle,
  43 + y_triangle + 13 * scaling, x_triangle + 35 * scaling,
  44 + y_triangle, RED);
  45 +}
  46 +
  47 +
  48 +void draw_target(struct target *t) {
  49 + if (!t->is_explosion)
  50 + gfx_filledRect(t->x - 10, t->y - 10, t->x + 10, t->y + 10,
  51 + t->color); // cel
  52 +
  53 + if (t->is_explosion) {
  54 + drawExplosion(t->x, t->y + t->explosion_counter * 10,
  55 + t->explosion_counter / 5.0);
  56 + }
  57 +
  58 +}
  59 +
  60 +
  61 +void move_target(struct target *t) {
  62 + if(!t->is_explosion)
  63 + {
  64 + t->x += t->speed_x;
  65 +
  66 + if (t->x > gfx_screenWidth())
  67 + t->x = 0;
  68 +
  69 + if (t->x < 0)
  70 + t->x = gfx_screenWidth() - 1;
  71 + }
  72 +
  73 + if (t->is_explosion) {
  74 + t->explosion_counter += 1;
  75 + }
  76 +
  77 + if (t->is_explosion && (t->explosion_counter == 10)) {
  78 + t->is_explosion = 0;
  79 + t->x = 0;
  80 + }
  81 +}
  82 +
  83 +int main() {
  84 + if (gfx_init())
  85 + exit(3);
  86 +
  87 + double angle = 90.0 * (M_PI / 180.0);
  88 +
  89 + double bullet_distance;
  90 + int is_shooting = 0;
  91 + double fire_angle;
  92 +
  93 + const int num_targets = 3;
  94 +
  95 + struct target t[num_targets];
  96 +
  97 + t[0].x = 0;
  98 + t[0].y = 40;
  99 + t[0].speed_x = 3;
  100 + t[0].is_explosion = 0;
  101 + t[0].color = MAGENTA;
  102 +
  103 + t[1].x = 1000;
  104 + t[1].y = 80;
  105 + t[1].speed_x = -5;
  106 + t[1].is_explosion = 0;
  107 + t[1].color = WHITE;
  108 +
  109 + t[2].x = 100;
  110 + t[2].y = 120;
  111 + t[2].speed_x = 7;
  112 + t[2].is_explosion = 0;
  113 + t[2].color = GREEN;
  114 +
  115 + while (1) {
  116 + double delta_angle = 2.0 * (M_PI / 180.0);
  117 + int x1_barrel = 150 * cos(angle - delta_angle);
  118 + int y1_barrel = 150 * sin(angle - delta_angle);
  119 + int x2_barrel = 150 * cos(angle + delta_angle);
  120 + int y2_barrel = 150 * sin(angle + delta_angle);
  121 + gfx_filledRect(0, 0, gfx_screenWidth() - 1, gfx_screenHeight() - 1, BLUE);
  122 +
  123 + gfx_filledCircle(gfx_screenWidth() / 2, gfx_screenHeight(), 100, YELLOW);
  124 + gfx_filledTriangle(gfx_screenWidth() / 2, gfx_screenHeight(),
  125 + gfx_screenWidth() / 2 + x1_barrel,
  126 + gfx_screenHeight() - y1_barrel,
  127 + gfx_screenWidth() / 2 + x2_barrel,
  128 + gfx_screenHeight() - y2_barrel, YELLOW);
  129 +
  130 + for (int i = 0; i < num_targets; ++i)
  131 + draw_target(&(t[i]));
  132 +
  133 +
  134 + int x_bullet = bullet_distance * cos(fire_angle);
  135 + int y_bullet = bullet_distance * sin(fire_angle);
  136 + int x_bullet_pot = gfx_screenWidth() / 2 + x_bullet;
  137 + int y_bullet_pot = gfx_screenHeight() - y_bullet;
  138 +
  139 + if (is_shooting) {
  140 + // if(!is_explosion)
  141 + gfx_filledCircle(gfx_screenWidth() / 2 + x_bullet,
  142 + gfx_screenHeight() - y_bullet, 10, RED); // pocisk
  143 +
  144 +
  145 + }
  146 +
  147 + gfx_updateScreen();
  148 +
  149 + if (is_shooting)
  150 + {
  151 + for (int i = 0; i < num_targets; ++i) {
  152 + if (hypot(x_bullet_pot - t[i].x, y_bullet_pot - t[i].y) < 50) {
  153 + t[i].is_explosion = 1;
  154 + t[i].explosion_counter = 0;
  155 + }
  156 + }
  157 + bullet_distance += 10.0;
  158 + }
  159 +
  160 + for (int i = 0; i < num_targets; ++i)
  161 + move_target(&(t[i]));
  162 +
  163 + if (gfx_isKeyDown(SDLK_RIGHT))
  164 + angle -= 1.0 * (M_PI / 180.0);
  165 + if (gfx_isKeyDown(SDLK_LEFT))
  166 + angle += 1.0 * (M_PI / 180.0);
  167 + if (gfx_isKeyDown(SDLK_SPACE)) {
  168 + is_shooting = 1;
  169 + bullet_distance = 170.0;
  170 + fire_angle = angle;
  171 + }
  172 + SDL_Delay(10);
  173 + };
  174 + return 0;
  175 +}
... ...
06-multiple_targets/makefile 0 → 100755
  View file @7165abd
  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
... ...