mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-25 14:36:13 +01:00
103 lines
No EOL
3.3 KiB
Text
103 lines
No EOL
3.3 KiB
Text
#macro AREA_DEF [ 16, 16, 4, 4, AREA_SHAPE.rectangle ]
|
|
|
|
enum AREA_DISTRIBUTION {
|
|
area,
|
|
border
|
|
}
|
|
|
|
enum AREA_SCATTER {
|
|
uniform,
|
|
random
|
|
}
|
|
|
|
function area_get_bbox(area) {
|
|
return [ area[0] - area[2], area[1] - area[3], area[0] + area[2], area[1] + area[3] ];
|
|
}
|
|
|
|
function area_get_random_point(area, distrib = AREA_DISTRIBUTION.area, scatter = AREA_SCATTER.random, index = 0, total = 1, _sed = 999) {
|
|
if(total == 0) return [0, 0];
|
|
|
|
var _area_x = array_safe_get(area, 0);
|
|
var _area_y = array_safe_get(area, 1);
|
|
var _area_w = array_safe_get(area, 2);
|
|
var _area_h = array_safe_get(area, 3);
|
|
var _area_t = array_safe_get(area, 4);
|
|
var xx = 0, yy = 0;
|
|
|
|
switch(distrib) {
|
|
case AREA_DISTRIBUTION.area :
|
|
if(scatter == AREA_SCATTER.uniform) {
|
|
var _col = ceil(sqrt(total));
|
|
var _row = ceil(total / _col);
|
|
|
|
var _iwid = _area_w * 2 / _col;
|
|
var _ihig = _area_h * 2 / _row;
|
|
|
|
var _irow = floor(index / _col);
|
|
var _icol = safe_mod(index, _col);
|
|
|
|
xx = _area_x - _area_w + _icol * _iwid;
|
|
yy = _area_y - _area_h + _irow * _ihig;
|
|
} else if(scatter == AREA_SCATTER.random) {
|
|
if(_area_t == AREA_SHAPE.rectangle) {
|
|
xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
|
|
yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
|
|
} else {
|
|
var rr = random_seed(360, _sed); _sed++;
|
|
xx = _area_x + lengthdir_x(1, rr) * random_seed(_area_w, _sed); _sed++;
|
|
yy = _area_y + lengthdir_y(1, rr) * random_seed(_area_h, _sed); _sed++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case AREA_DISTRIBUTION.border :
|
|
if(scatter == AREA_SCATTER.uniform) {
|
|
if(_area_t == AREA_SHAPE.rectangle) {
|
|
var perimeter = _area_w * 2 + _area_h * 2;
|
|
var i = perimeter * index / total;
|
|
if(i < _area_w) {
|
|
xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
|
|
yy = _area_y - _area_h;
|
|
} else if(i < _area_w + _area_h) {
|
|
xx = _area_x - _area_w;
|
|
yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
|
|
} else if(i < _area_w * 2 + _area_h) {
|
|
xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
|
|
yy = _area_y + _area_h;
|
|
} else {
|
|
xx = _area_x + _area_w;
|
|
yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
|
|
}
|
|
} else {
|
|
var rr = 360 * index / total;
|
|
xx = _area_x + lengthdir_x(_area_w, rr);
|
|
yy = _area_y + lengthdir_y(_area_h, rr);
|
|
}
|
|
} else if(scatter == AREA_SCATTER.random) {
|
|
if(_area_t == AREA_SHAPE.rectangle) {
|
|
var perimeter = _area_w * 2 + _area_h * 2;
|
|
var i = random_seed(perimeter, _sed); _sed++;
|
|
if(i < _area_w) {
|
|
xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
|
|
yy = _area_y - _area_h;
|
|
} else if(i < _area_w + _area_h) {
|
|
xx = _area_x - _area_w;
|
|
yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
|
|
} else if(i < _area_w * 2 + _area_h) {
|
|
xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
|
|
yy = _area_y + _area_h;
|
|
} else {
|
|
xx = _area_x + _area_w;
|
|
yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
|
|
}
|
|
} else {
|
|
var rr = random_seed(360, _sed); _sed++;
|
|
xx = _area_x + lengthdir_x(_area_w, rr);
|
|
yy = _area_y + lengthdir_y(_area_h, rr);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
return [xx, yy];
|
|
} |