gwj / graphics_tutorial · Commits

Commit 313be3d4e2571d8c578f16333c0492bac90a9c6d

Authored by Grzegorz Jabłoński
1 parent 4e849b52

Added intermediate step

Inline Side-by-side
Showing 8 changed files with 124 additions and 0 deletions
06-multiple-targets/cannon.c 0 → 100644
  View file @313be3d
  1 +#include "primlib.h"
  2 +#include <stdlib.h>
  3 +
  4 +int main() {
  5 + if (gfx_init())
  6 + exit(3);
  7 +
  8 + double angle = 90.0 * (M_PI / 180.0);
  9 +
  10 + double bullet_distance;
  11 + int is_shooting = 0;
  12 + double fire_angle;
  13 +
  14 + struct target_data {
  15 + int x;
  16 + int y;
  17 + int dir;
  18 + enum color c;
  19 + int speed;
  20 + int size;
  21 + };
  22 +
  23 + struct target_data td[3];
  24 +
  25 + td[0].x = 300;
  26 + td[0].y = 40;
  27 + td[0].c = MAGENTA;
  28 + td[0].speed = 3;
  29 + td[0].size = 8;
  30 + td[0].dir = -1;
  31 +
  32 + td[1].x = 0;
  33 + td[1].y = 70;
  34 + td[1].c = YELLOW;
  35 + td[1].speed = 2;
  36 + td[1].size = 10;
  37 + td[1].dir = +1;
  38 +
  39 + td[2].x = 0;
  40 + td[2].y = 100;
  41 + td[2].c = BLACK;
  42 + td[2].speed = 4;
  43 + td[2].size = 15;
  44 + td[2].dir = +1;
  45 +
  46 + while (1) {
  47 + double delta_angle = 2.0 * (M_PI / 180.0);
  48 + int x1_barrel = 150 * cos(angle - delta_angle);
  49 + int y1_barrel = 150 * sin(angle - delta_angle);
  50 + int x2_barrel = 150 * cos(angle + delta_angle);
  51 + int y2_barrel = 150 * sin(angle + delta_angle);
  52 + gfx_filledRect(0, 0, gfx_screenWidth() - 1, gfx_screenHeight() - 1, BLUE);
  53 + gfx_filledCircle(gfx_screenWidth() / 2, gfx_screenHeight(), 100, YELLOW);
  54 + gfx_filledTriangle(gfx_screenWidth() / 2, gfx_screenHeight(),
  55 + gfx_screenWidth() / 2 + x1_barrel,
  56 + gfx_screenHeight() - y1_barrel,
  57 + gfx_screenWidth() / 2 + x2_barrel,
  58 + gfx_screenHeight() - y2_barrel, YELLOW);
  59 +
  60 + { // display targets
  61 + int i;
  62 + for (i = 0; i < sizeof(td) / sizeof(td[0]); ++i) {
  63 + gfx_filledRect(td[i].x - td[i].size, td[i].y - td[i].size,
  64 + td[i].x + td[i].size, td[i].y + td[i].size, td[i].c);
  65 + }
  66 + }
  67 +
  68 + if (is_shooting) {
  69 + int x_bullet = bullet_distance * cos(fire_angle);
  70 + int y_bullet = bullet_distance * sin(fire_angle);
  71 +
  72 + gfx_filledCircle(gfx_screenWidth() / 2 + x_bullet,
  73 + gfx_screenHeight() - y_bullet, 10, RED);
  74 + }
  75 +
  76 + gfx_updateScreen();
  77 +
  78 + if (is_shooting)
  79 + bullet_distance += 5.0;
  80 +
  81 + { // move targets
  82 + int i;
  83 + for (i = 0; i < sizeof(td) / sizeof(td[0]); ++i) {
  84 + td[i].x += td[i].speed * td[i].dir;
  85 +
  86 + if (td[i].x > gfx_screenWidth()) {
  87 + td[i].dir = -1;
  88 + }
  89 +
  90 + if (td[i].x < 0) {
  91 + td[i].dir = +1;
  92 + }
  93 + }
  94 + }
  95 +
  96 + if (gfx_isKeyDown(SDLK_RIGHT))
  97 + angle -= 1.0 * (M_PI / 180.0);
  98 + if (gfx_isKeyDown(SDLK_LEFT))
  99 + angle += 1.0 * (M_PI / 180.0);
  100 + if (gfx_isKeyDown(SDLK_SPACE)) {
  101 + is_shooting = 1;
  102 + bullet_distance = 170.0;
  103 + fire_angle = angle;
  104 + }
  105 + SDL_Delay(10);
  106 + };
  107 + return 0;
  108 +}
06-multiple_targets/makefile renamed to 06-multiple-targets/makefile
  View file @313be3d
06-multiple_targets/cannon.c renamed to 07-multiple_targets_functions/cannon.c
  View file @313be3d
07-tapered_bullet/makefile renamed to 07-multiple_targets_functions/makefile
  View file @313be3d
07-tapered_bullet/bullet.png renamed to 08-tapered_bullet/bullet.png
View file @313be3d

88.4 KB
07-tapered_bullet/bullet.svg renamed to 08-tapered_bullet/bullet.svg
  View file @313be3d
07-tapered_bullet/cannon.c renamed to 08-tapered_bullet/cannon.c
  View file @313be3d
08-tapered_bullet/makefile 0 → 100755
  View file @313be3d
  1 +TARGET=cannon
  2 +
  3 +all: $(TARGET)
  4 +
  5 +%.o:%.c
  6 + gcc -g -I.. -Wall -pedantic `sdl2-config --cflags` -c $< -o $@
  7 +
  8 +$(TARGET): $(TARGET).o ../primlib.o
  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).o: $(TARGET).c ../primlib.h
  14 +
  15 +clean:
  16 + -rm $(TARGET) $(TARGET).o ../primlib.o
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