Point_in_triangle - hpgDesigns/hpgdesigns-dev.io GitHub Wiki
Description
Checks if the given point is inside the given triangle and returns the result.
Parameters
| Parameter | Data Type | Description |
|---|---|---|
| px | double | x coordinate of the point |
| py | double | y coordinate of the point |
| x1 | double | x coordinate of the first side of the triangle |
| y1 | double | y coordinate of the first side of the triangle |
| x2 | double | x coordinate of the second side of the triangle |
| y2 | double | y coordinate of the second side of the triangle |
| x3 | double | x coordinate of the third side of the triangle |
| y3 | double | y coordinate of the third side of the triangle |
Return Values
boolean: Returns whether the point lies inside the triangle.
Example Call
// demonstrates checking if an instance of the enemy object is in the calling instances field of view
var inst = instance_nearest(x, y, obj_enemy);
if (instance_exists(inst)) {
var x1 = x + lengthdir_x(100, image_angle - 45),
y1 = y + lengthdir_y(100, image_angle - 45),
x2 = x + lengthdir_x(100, image_angle + 45),
y2 = y + lengthdir_y(100, image_angle + 45);
if (point_in_triangle(inst.x, inst.y, x, y, x1, y1, x2, y2)) {
// enemy is in field of view
}
}
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