#include "externals.hh"
#include "utilities.hh"


void disableButton( )
{
	ImGui::PushStyleColor( ImGuiCol_Button , ImColor( .3f , .3f , .3f ) );
	ImGui::PushStyleColor( ImGuiCol_ButtonHovered , ImColor( .3f , .3f , .3f ) );
	ImGui::PushStyleColor( ImGuiCol_ButtonActive , ImColor( .3f , .3f , .3f ) );
}

/*----------------------------------------------------------------------------*/

void updateAngle(
		__rw__	float& initial ,
		__rd__	const float delta
	)
{
	initial = fmod( initial + delta + 540 , 360 ) - 180;
}

void anglesToMatrix(
		__rd__	float const* angles ,
		__wr__	float* matrix )
{
	float c[3] , s[3];
	for ( int i = 0 ; i < 3 ; i ++ ) {
		const float a = M_PI * angles[ i ] / 180;
		c[i] = cos( a );
		s[i] = sin( a );
	}
	matrix[0] = c[1]*c[2];
	matrix[1] = s[0]*s[1]*c[2] - c[0]*s[2];
	matrix[2] = s[0]*s[2] + c[0]*s[1]*c[2];
	matrix[3] = c[1]*s[2];
	matrix[4] = c[0]*c[2] + s[0]*s[1]*s[2];
	matrix[5] = c[0]*s[1]*s[2] - s[0]*c[2];
	matrix[6] = -s[1];
	matrix[7] = s[0]*c[1];
	matrix[8] = c[0]*c[1];
}