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Allow circles to be transformed to area points.

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Sandu Liviu Catalin
2020-04-20 16:00:47 +03:00
parent 405c2920e7
commit 2f31a9495a
5 changed files with 91 additions and 0 deletions
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28
module/Base/Circle.cpp
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@ -467,6 +467,33 @@ Circle Circle::Abs() const
return {pos.Abs(), std::fabs(rad)};
}
// ------------------------------------------------------------------------------------------------
Array Circle::ToPointsArray(SQInteger num_segments) const
{
// Allocate an array with the same amount of elements as the number of segments
Array arr(SqVM(), num_segments);
// Iterate the specified segments array
arr.AppendFromCounted([this](HSQUIRRELVM vm, SQInteger i, SQInteger num_segments) -> bool {
if (i >= num_segments) return false;
// Get the current angle
#ifdef SQUSEDOUBLE
SQFloat theta = 2.0d * SQMOD_PI64 * static_cast< SQFloat >(i) / static_cast< SQFloat >(num_segments);
#else
SQFloat theta = 2.0f * SQMOD_PI * static_cast< SQFloat >(i) / static_cast< SQFloat >(num_segments);
#endif // SQUSEDOUBLE
// Calculate the x component
SQFloat x = (rad * std::cos(theta)) + pos.x;
// Calculate the y component
SQFloat y = (rad * std::sin(theta)) + pos.y;
// Push the Vector2 instance on the stack
Var< Vector2 >::push(vm, Vector2{x, y});
// Insert the element on the stack into the array
return true;
}, num_segments);
// Return the resulted array
return arr;
}
// ------------------------------------------------------------------------------------------------
const Circle & Circle::Get(StackStrF & str)
{
@ -539,6 +566,7 @@ void Register_Circle(HSQUIRRELVM vm)
.Func(_SC("SetPositionEx"), &Circle::SetPositionEx)
.FmtFunc(_SC("SetStr"), &Circle::SetStr)
.Func(_SC("Clear"), &Circle::Clear)
.Func(_SC("ToPointsArray"), &Circle::ToPointsArray)
// Member Overloads
.Overload< void (Circle::*)(void) >(_SC("Generate"), &Circle::Generate)
.Overload< void (Circle::*)(Val, Val, bool) >(_SC("Generate"), &Circle::Generate)

5
module/Base/Circle.hpp
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@ -411,6 +411,11 @@ struct Circle
*/
Circle Abs() const;
/* --------------------------------------------------------------------------------------------
* Transform this into an array of Vector2 points that form a circle.
*/
Array ToPointsArray(SQInteger num_segments) const;
/* --------------------------------------------------------------------------------------------
* Extract the values for components of the Circle type from a string.
*/