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circle.cpp
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#include "circle.h"
#define PI 3.14159265
circle::circle(int weight,GLubyte *rang,int line_pattern[8])
{
this->thickness=weight;
this->color[0]=rang[0];
this->color[1]=rang[1];
this->color[2]=rang[2];
this->color[3]=rang[3];
this->pattern[0]=line_pattern[0];
this->pattern[1]=line_pattern[1];
this->pattern[2]=line_pattern[2];
this->pattern[3]=line_pattern[3];
this->pattern[4]=line_pattern[4];
this->pattern[5]=line_pattern[5];
this->pattern[6]=line_pattern[6];
this->pattern[7]=line_pattern[7];
this->object_num=objectNumber;
this->object_name="Circle";
objectNumber++;
}
void circle::midpoint_circle(point p1, point p2)
{
this->initial=p1;
this->final=p2;
GLint cx = p1.x;
GLint x = p2.x;
GLint cy = p1.y;
GLint y = p2.y;
vector<pair<int,int> > temp_points;
GLint radius = pow((x-cx)*(x-cx)+(y-cy)*(y-cy),0.5);
GLint ytemp,xtemp;
ytemp= radius;
xtemp = 0;
GLfloat pk = 1-radius;
while(ytemp>=xtemp){
this->points.push_back(make_pair(int(xtemp)+cx,int(ytemp)+cy));
temp_points.push_back(make_pair(int(xtemp),int(ytemp)));
if(pk>=0){
pk = pk+2*xtemp-2*ytemp+1;
xtemp = xtemp+1;
ytemp = ytemp-1;
}
else{
pk = pk+2*xtemp+1;
xtemp = xtemp+1;
}
}
for( long i=points.size()-1;i>=0;i--){
this->points.push_back(make_pair(int(temp_points[i].second)+cx,int(temp_points[i].first)+cy));
temp_points.push_back(make_pair(int(temp_points[i].second),int(temp_points[i].first)));
}
for(long i=points.size()-1;i>=0;i--){
this->points.push_back(make_pair(int(temp_points[i].first)+cx,-int(temp_points[i].second)+cy));
temp_points.push_back(make_pair(int(temp_points[i].first),-int(temp_points[i].second)));
}
for(long i=points.size()-1;i>=0;i--){
this->points.push_back(make_pair(-int(temp_points[i].first)+cx,int(temp_points[i].second)+cy));
temp_points.push_back(make_pair(-int(temp_points[i].first),int(temp_points[i].second)));
}
this->algo_used="Midpoint";
}
void circle::translate(point t)
{
Eigen::MatrixXd point_matrix(3,2);
point_matrix(0,0)=object::transform_object->initial.x;
point_matrix(1,0)=object::transform_object->initial.y;
point_matrix(2,0)=1;
point_matrix(0,1)=object::transform_object->final.x;
point_matrix(1,1)=object::transform_object->final.y;
point_matrix(2,1)=1;
Eigen::MatrixXd translate_matrix(3,3);
translate_matrix<<1,0,t.x,
0,1,t.y,
0,0,1;
Eigen::MatrixXd new_points(3,2);
new_points = translate_matrix*point_matrix;
p1.x=int(new_points(0,0));
p1.y=int(new_points(1,0));
p2.x=int(new_points(0,1));
p2.y=int(new_points(1,1));
if(transform_object->algo_used=="Midpoint"){
this->midpoint_circle(p1,p2);
}
all_objects[unsigned(index_selected)]=this;
objectNumber=all_objects[all_objects.size()-1]->object_num+1;
this->object_num=unsigned(selected_object_num);
}
void circle::rotate(double angle, point pivot)
{
Eigen::MatrixXd point_matrix(3,2);
point_matrix(0,0)=object::transform_object->initial.x;
point_matrix(1,0)=object::transform_object->initial.y;
point_matrix(2,0)=1;
point_matrix(0,1)=object::transform_object->final.x;
point_matrix(1,1)=object::transform_object->final.y;
point_matrix(2,1)=1;
Eigen::MatrixXd rotate_matrix(3,3);
rotate_matrix<<cos(angle*PI/180),-sin(angle*PI/180),0,
sin(angle*PI/180),cos(angle*PI/180),0,
0,0,1;
Eigen::MatrixXd pos_matrix(3,3);
pos_matrix<<1,0,pivot.x,
0,1,pivot.y,
0,0,1;
Eigen::MatrixXd neg_matrix(3,3);
neg_matrix<<1,0,-pivot.x,
0,1,-pivot.y,
0,0,1;
Eigen::MatrixXd new_points(3,2);
new_points = pos_matrix*rotate_matrix*neg_matrix*point_matrix;
p1.x=int(new_points(0,0));
p1.y=int(new_points(1,0));
p2.x=int(new_points(0,1));
p2.y=int(new_points(1,1));
this->midpoint_circle(p1,p2);
all_objects[unsigned(index_selected)]=this;
objectNumber=all_objects[all_objects.size()-1]->object_num+1;
this->object_num=unsigned(selected_object_num);
}
void circle::scale(scale_struct S, point pivot)
{
Eigen::MatrixXd point_matrix(3,2);
point_matrix(0,0)=object::transform_object->initial.x;
point_matrix(1,0)=object::transform_object->initial.y;
point_matrix(2,0)=1;
point_matrix(0,1)=object::transform_object->final.x;
point_matrix(1,1)=object::transform_object->final.y;
point_matrix(2,1)=1;
Eigen::MatrixXd scale_matrix(3,3);
scale_matrix<<S.x,0,0,
0,S.y,0,
0,0,1;
Eigen::MatrixXd pos_matrix(3,3);
pos_matrix<<1,0,pivot.x,
0,1,pivot.y,
0,0,1;
Eigen::MatrixXd neg_matrix(3,3);
neg_matrix<<1,0,-pivot.x,
0,1,-pivot.y,
0,0,1;
Eigen::MatrixXd new_points(3,2);
new_points = pos_matrix*scale_matrix*neg_matrix*point_matrix;
p1.x=int(new_points(0,0));
p1.y=int(new_points(1,0));
p2.x=int(new_points(0,1));
p2.y=int(new_points(1,1));
this->midpoint_circle(p1,p2);
all_objects[unsigned(index_selected)]=this;
objectNumber=all_objects[all_objects.size()-1]->object_num+1;
this->object_num=unsigned(selected_object_num);
}