96 lines
2.0 KiB
C++
96 lines
2.0 KiB
C++
#include<hgl/type/RectScope.h>
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#include<hgl/graph/Triangle.h>
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#include<hgl/graph/Ray.h>
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#include<hgl/2d/TGA.h>
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#include<hgl/2d/Bitmap.h>
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#include<hgl/2d/BitmapSave.h>
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#include<hgl/2d/DrawGeometry.h>
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#include<hgl/Time.h>
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#include<iostream>
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#include<random>
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std::random_device rd;
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std::mt19937 gen(rd());
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std::uniform_real_distribution<> dis_01(0, 1);
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std::uniform_int_distribution<> dis_int(0, 1023);
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using namespace hgl;
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using namespace std;
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void Pick2DRectangle()
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{
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RectScope2f rs;
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rs.SetPosition(0,0);
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rs.SetSize(1,1);
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rs.PointIn(hgl::Vector2f(0.5,0.5));
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}
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void Pick2DTriangle()
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{
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graph::Triangle2i tri;
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Vector2i v[3];
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Vector3i edge_length;
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Vector2i t;
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for(int i=0;i<3;i++)
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{
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v[i].x=dis_int(gen);
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v[i].y=dis_int(gen);
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tri.SetVertex(i,v[i]);
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std::cout<<"triangle "<<i<<"："<<v[i].x<<","<<v[i].y<<std::endl;
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}
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edge_length.x=tri.GetEdgeLength(0);
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edge_length.y=tri.GetEdgeLength(1);
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edge_length.z=tri.GetEdgeLength(2);
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std::cout<<"triangle area(method 1): "<<TriangleArea(edge_length.x,edge_length.y,edge_length.z)<<std::endl;
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std::cout<<"triangle area(method 2): "<<tri.Area()<<std::endl;
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bitmap::BitmapRGB8 bmp;
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Vector3u8 clear_color(0,0,0);
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bmp.Create(1024,1024);
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bmp.ClearColor(clear_color);
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bitmap::DrawGeometryRGB8 draw(&bmp);
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draw.SetDrawColor(Vector3u8(255,255,255));
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draw.DrawLine(v[0],v[1]);
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draw.DrawLine(v[1],v[2]);
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draw.DrawLine(v[2],v[0]);
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double st=GetDoubleTime();
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for(int i=0;i<10000;i++)
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{
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t.x=dis_int(gen);
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t.y=dis_int(gen);
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if(tri.PointIn(t))
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draw.SetDrawColor(Vector3u8(0,255,0));
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else
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draw.SetDrawColor(Vector3u8(0,0,255));
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draw.PutPixel(t);
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}
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double et=GetDoubleTime();
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std::cout<<"test 10000 points in a triangle cost "<<(et-st)<<" seconds."<<std::endl;
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bitmap::SaveBitmapToTGA(OS_TEXT("Triangle.tga"),&bmp);
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}
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int main(int,char **)
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{
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Pick2DTriangle();
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return 0;
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} |