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#define BASE_IMPLEMENTATION
#define BASE_RAND_IMPLEMENTATION
#define BASE_MATH_IMPLEMENTATION
#define BASE_PLATFORM
#define BASE_PLATFORM_IMPLEMENTATION
#include "../base/base_include.h"
#define WINDOW_WIDTH 800
#define WINDOW_HEIGHT 1200
internal void
load_entities(Display *MainDisplay, Window *window, GC *gc, s32 entity_count)
{
s32 x = (s32)generate_random_u64(RAND_CONSTANT);
s32 y = (s32)generate_random_u64(RAND_CONSTANT);
for (s32 index = 0; index < entity_count; ++index)
{
s32 delta = (s32)generate_random_u64(RAND_CONSTANT);
XDrawRectangle(MainDisplay,
*window,
*gc,
x * (1/delta),
y * (1/delta),
50,
50);
XFillRectangle(MainDisplay,
*window,
*gc,
x * (1/delta),
y * (1/delta),
50,
50);
}
}
internal void
load_user(Display *MainDisplay, Window *window, GC *gc, s32 x, s32 y, u32 width, u32 height)
{
XDrawRectangle(MainDisplay, *window, *gc, x, y, width, height);
XFillRectangle(MainDisplay, *window, *gc, x, y, width, height);
}
int main()
{
b32 running = 1;
Display *MainDisplay = XOpenDisplay(0);
mem_arena *arena = arena_create(MiB(8));
Window root = XDefaultRootWindow(MainDisplay);
int screen = DefaultScreen(MainDisplay);
Visual *v = DefaultVisual(MainDisplay, screen);
XSetWindowAttributes wa = {
.background_pixmap = None,
.background_pixel = BlackPixel(MainDisplay, DefaultScreen(MainDisplay)),
.border_pixmap = CopyFromParent,
.border_pixel = 0,
.bit_gravity = ForgetGravity,
.win_gravity = NorthWestGravity,
.backing_store = NotUseful,
.backing_planes = 1,
.backing_pixel = 0,
.save_under = False,
.event_mask = 0,
.do_not_propagate_mask = 0,
.override_redirect = False,
.colormap = CopyFromParent,
.cursor = None
};
s32 dp_heigth = DisplayHeight(MainDisplay, screen);
s32 dp_width = DisplayWidth(MainDisplay, screen);
WindowProperties p = {
.x =
.y =
.height =
.width =
.border_width = 0,
.window_depth = CopyFromParent,
.window_class =
.value_mask =
};
Window window = XCreateWindow( MainDisplay, root, dp_width / 2, dp_heigth / 2,
(u32)WINDOW_WIDTH, (u32)WINDOW_HEIGHT, 0, CopyFromParent, v, CWBackPixel, &wa);
XSetWindowBorder(MainDisplay, window, 60);
XSelectInput(MainDisplay, window, ExposureMask | StructureNotifyMask | KeyReleaseMask | KeyPressMask);
XMapWindow(MainDisplay, window);
XEvent event;
f32 DELTA = 2.5;
u32 rect_width = 50;
u32 rect_height = 50;
s32 rect_x_position = p.width / 2;
s32 rect_y_position = p.height / 2;
s32 rect_enemy_x_position = (p.width / 2) + 300;
s32 rect_enemy_y_position = (p.height / 2) + 300;
u64 color = 0x0FF0FF00;
GC gc = XCreateGC(MainDisplay, window, 0, NIL);
XSetForeground(MainDisplay, gc, color);
for (;running;)
{
//- handle collision detection
{
if(rect_y_position >= WINDOW_HEIGHT) DELTA = -DELTA;
if(rect_x_position >= WINDOW_WIDTH) DELTA = -DELTA;
if(rect_enemy_y_position >= WINDOW_HEIGHT) DELTA = -DELTA;
if(rect_enemy_x_position >= WINDOW_WIDTH) DELTA = -DELTA;
}
//- handle enemy movement
{
s32 dy = rect_y_position - rect_enemy_y_position;
s32 dx = rect_x_position - rect_enemy_x_position;
//- normalize the distance | why this is needed? no clue
f32 distance = sqrtf(dx*dx + dy*dy);
if(distance > 1.0f) {
f32 speed = DELTA * 0.5f;
rect_enemy_x_position += (s32)((dx / distance) * speed);
rect_enemy_y_position += (s32)((dy / distance) * speed);
}
}
XNextEvent(MainDisplay, &event);
switch (event.type)
{
case(KeyPress):
{
KeySym keysym = XLookupKeysym(&event.xkey, 0);
//- handle user movement
{
if(keysym == XK_h) rect_x_position -= DELTA*1.5;
else if(keysym == XK_l) rect_x_position += DELTA*1.5;
else if(keysym == XK_k) rect_y_position -= DELTA*1.5;
else if(keysym == XK_j) rect_y_position += DELTA*1.5;
else if(keysym == XK_s);
else if(keysym == XK_Escape || keysym == XK_q) goto exit;
}
// clear screen before drawing entities
XClearWindow(MainDisplay, window);
//- draw entities
{
} break;
}
default:
{
}
}
}
exit:
arena_destroy(arena);
return 0;
}
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