commit 5930554875887db46b4745f7e6fc38136d118fe0
Author: Matsuda Kenji <info@mtkn.jp>
Date: Thu, 15 Dec 2022 09:27:42 +0900
first commit
Diffstat:
| A | .gitignore | | | 1 | + |
| A | Makefile | | | 11 | +++++++++++ |
| A | main.c | | | 110 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | obj.c | | | 22 | ++++++++++++++++++++++ |
| A | obj.h | | | 9 | +++++++++ |
5 files changed, 153 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+main
diff --git a/Makefile b/Makefile
@@ -0,0 +1,11 @@
+INCS=-I/usr/X11R6/include
+CFLAGS=-Wall -Wextra -std=c11
+LIBS=-L/usr/X11R6/lib -lX11 -lXext
+IN=*.c
+OUT=main
+
+all: main.c
+ $(CC) $(INCS) $(CFLAGS) -o $(OUT) $(IN) $(LIBS)
+
+run: all
+ ./$(OUT)
diff --git a/main.c b/main.c
@@ -0,0 +1,110 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include <X11/Xlib.h>
+
+#include "obj.h"
+
+#define INIT_WIDTH 800
+#define INIT_HEIGHT 600
+#define FPS 60
+#define RECT_WIDTH 300
+#define RECT_HEIGHT 300
+
+int
+main(void)
+{
+ Display *display;
+ Window window;
+ unsigned int win_width = INIT_WIDTH, win_height = INIT_HEIGHT;
+ GC gc;
+ Pixmap pm;
+ Atom wm_delete_window;
+ Obj square = {1, 1, 100, 100, 20, 20};
+
+ if((display = XOpenDisplay(NULL)) == NULL){
+ fprintf(stderr, "ERROR: could not open display\n");
+ exit(1);
+ }
+ window = XCreateSimpleWindow(
+ display,
+ XDefaultRootWindow(display),
+ 0, 0,
+ win_width, win_height,
+ 0, 0,
+ 0);
+ XStoreName(display, window, "UNKO");
+ gc = XCreateGC(display, window, 0, NULL);
+ pm = XCreatePixmap(display, window, win_width, win_height,
+ DefaultDepth(display, DefaultScreen(display)));
+
+ wm_delete_window = XInternAtom(display, "WM_DELETE_WINDOW", False);
+ XSetWMProtocols(display, window, &wm_delete_window, 1);
+
+ XSelectInput(display, window, KeyPressMask);
+
+ XMapWindow(display, window);
+
+ int quit = 0;
+ while (!quit) {
+ while (XPending(display) > 0) {
+ XEvent event = {0};
+ XNextEvent(display, &event);
+ switch (event.type) {
+ case KeyPress: {
+ switch (XLookupKeysym(&event.xkey, 0)) {
+ case 'q':
+ quit = 1;
+ break;
+ default:
+ break;
+ }
+ } break;
+ case ClientMessage: {
+ if ((Atom) event.xclient.data.l[0] == wm_delete_window) {
+ quit = 1;
+ }
+ } break;
+ }
+ }
+
+ XSetForeground(display, gc, 0);
+ XFillRectangle(display, pm, gc, 0, 0, win_width, win_height);
+
+ XWindowAttributes window_attributes_return;
+ XGetWindowAttributes(display, window, &window_attributes_return);
+ win_width = window_attributes_return.width;
+ win_height = window_attributes_return.height;
+
+
+ if(square.px <= 0){
+ square.px = 0;
+ square.vx *= -1;
+ }
+ if(win_width <= square.px + square.width){
+ square.px = win_width - square.width;
+ square.vx *= -1;
+ }
+ if(square.py <= 0){
+ square.py = 0;
+ square.vy *= -1;
+ }
+ if(win_height <= square.py + square.height){
+ square.py = win_height - square.height;
+ square.vy *= -1;
+ }
+ obj_accel(&square, 0, 9.8);
+ obj_next_tick(&square, 1.0/FPS);
+ XSetForeground(display, gc, 0x00FF00);
+ XFillRectangle(display, pm, gc, square.px, square.py, square.width, square.height);
+
+ XCopyArea(display, pm, window, gc, 0, 0, win_width, win_height, 0, 0);
+
+ struct timespec timetosleep = {0, 1000*1000*1000/FPS}; //not accurate
+ nanosleep(&timetosleep, NULL);
+ }
+
+ XCloseDisplay(display);
+ return 0;
+}
diff --git a/obj.c b/obj.c
@@ -0,0 +1,22 @@
+#include "obj.h"
+
+void
+obj_move(Obj *obj, float px, float py)
+{
+ obj->px = px;
+ obj->py = py;
+}
+
+void
+obj_next_tick(Obj *obj, float dt)
+{
+ obj->px += obj->vx * dt;
+ obj->py += obj->vy * dt;
+}
+
+void
+obj_accel(Obj *obj, float ax, float ay)
+{
+ obj->vx += ax;
+ obj->vy += ay;
+}
diff --git a/obj.h b/obj.h
@@ -0,0 +1,9 @@
+typedef struct Obj{
+ float px, py;
+ float vx, vy;
+ float width, height;
+} Obj;
+
+void obj_move(Obj *obj, float px, float py); // move obj to the pos
+void obj_next_tick(Obj *obj, float dt); // move obj by velocity * dt
+void obj_accel(Obj *obj, float ax, float ay); // accelerate obj by accel
