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101 lines
No EOL
3.2 KiB
Text
101 lines
No EOL
3.2 KiB
Text
#macro AREA_DEF [ 16, 16, 4, 4, AREA_SHAPE.rectangle ]
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enum AREA_DISTRIBUTION {
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area,
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border
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}
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enum AREA_SCATTER {
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uniform,
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random
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}
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function area_get_bbox(area) {
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return [ area[0] - area[2], area[1] - area[3], area[0] + area[2], area[1] + area[3] ];
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}
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function area_get_random_point(area, distrib = AREA_DISTRIBUTION.area, scatter = AREA_SCATTER.random, index = 0, total = 1, _sed = 999) {
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if(total == 0) return [0, 0];
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var _area_x = array_safe_get(area, 0);
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var _area_y = array_safe_get(area, 1);
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var _area_w = array_safe_get(area, 2);
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var _area_h = array_safe_get(area, 3);
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var _area_t = array_safe_get(area, 4);
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var xx = 0, yy = 0;
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switch(distrib) {
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case AREA_DISTRIBUTION.area :
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if(scatter == AREA_SCATTER.uniform) {
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var _col = ceil(sqrt(total));
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var _iwid = _area_w * 2 / _col;
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var _ihig = _area_h * 2 / _col;
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var _irow = floor(index / _col);
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var _icol = safe_mod(index, _col);
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xx = _area_x - _area_w + _icol * _iwid;
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yy = _area_y - _area_h + _irow * _ihig;
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} else if(scatter == AREA_SCATTER.random) {
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if(_area_t == AREA_SHAPE.rectangle) {
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xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
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yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
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} else {
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var rr = random_seed(360, _sed); _sed++;
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xx = _area_x + lengthdir_x(1, rr) * random_seed(_area_w, _sed); _sed++;
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yy = _area_y + lengthdir_y(1, rr) * random_seed(_area_h, _sed); _sed++;
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}
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}
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break;
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case AREA_DISTRIBUTION.border :
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if(scatter == AREA_SCATTER.uniform) {
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if(_area_t == AREA_SHAPE.rectangle) {
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var perimeter = _area_w * 2 + _area_h * 2;
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var i = perimeter * index / total;
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if(i < _area_w) {
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xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
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yy = _area_y - _area_h;
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} else if(i < _area_w + _area_h) {
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xx = _area_x - _area_w;
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yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
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} else if(i < _area_w * 2 + _area_h) {
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xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
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yy = _area_y + _area_h;
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} else {
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xx = _area_x + _area_w;
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yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
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}
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} else {
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var rr = 360 * index / total;
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xx = _area_x + lengthdir_x(_area_w, rr);
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yy = _area_y + lengthdir_y(_area_h, rr);
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}
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} else if(scatter == AREA_SCATTER.random) {
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if(_area_t == AREA_SHAPE.rectangle) {
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var perimeter = _area_w * 2 + _area_h * 2;
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var i = random_seed(perimeter, _sed); _sed++;
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if(i < _area_w) {
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xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
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yy = _area_y - _area_h;
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} else if(i < _area_w + _area_h) {
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xx = _area_x - _area_w;
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yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
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} else if(i < _area_w * 2 + _area_h) {
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xx = _area_x + random_range_seed(-_area_w, _area_w, _sed); _sed++;
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yy = _area_y + _area_h;
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} else {
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xx = _area_x + _area_w;
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yy = _area_y + random_range_seed(-_area_h, _area_h, _sed); _sed++;
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}
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} else {
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var rr = random_seed(360, _sed); _sed++;
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xx = _area_x + lengthdir_x(_area_w, rr);
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yy = _area_y + lengthdir_y(_area_h, rr);
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}
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}
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break;
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}
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return [xx, yy];
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} |