//绘制1坐标轴,含有箭头:
private void DrawOLineInGL(double azimuth, double elevation, float length, float width, Color color, bool arrow)
{
float colorR, colorG, colorB;
float x, y, z;
colorR = color.R / 255.0f;
colorG = color.G / 255.0f;
colorB = color.B / 255.0f;
x = length * (float)Math.Cos(elevation) * (float)Math.Cos(azimuth);
y = length * (float)Math.Cos(elevation) * (float)Math.Sin(azimuth);
z = length * (float)Math.Sin(elevation);
GL.LineWidth(width);
GL.Begin(BeginMode.Lines);
GL.Color3(colorR, colorG, colorB);
GL.Vertex3(0.0f, 0.0f, 0.0f);
GL.Vertex3(x, y, z); //三轴末端位置
GL.End();
if (arrow)
{
float vx, vy, vz;
vx = xMul(y, z, 0, 1);
vy = xMul(z, x, 1, 0);
vz = xMul(x, y, 0, 0);
GL.LineWidth(1.0f);
GL.PushMatrix(); //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
GL.Translate(x, y, z); //坐标轴箭头所在位置
if (isInLimits(elevation, Math.PI / 2, Math.PI / 2 * 3))
{
GL.Rotate((float)(90 - elevation / Math.PI * 180), vx, vy, vz); //上半球?
}
else
{
GL.Rotate(-(float)(90 - elevation / Math.PI * 180), vx, vy, vz); //下半球?
}
Glu.Cylinder(Glu.NewQuadric(), 0.03, 0.0, 0.2, 20, 5); //圆锥形作箭头
//Glu.Sphere(Glu.NewQuadric(), 0.05, 12, 12);//球体作箭头
GL.PopMatrix(); //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
}
}
//画多个内置立体件:
private void DrawModels()
{
float width = 3;
float height = 3;
float length = 3;
GL.LineWidth(4);
GL.PointSize(8);
var obj = Glu.NewQuadric();
//Glu.QuadricDrawStyle(obj, QuadricDrawStyle.Line);
//Glu.QuadricDrawStyle(obj, QuadricDrawStyle.Silhouette);
//Glu.QuadricDrawStyle(obj, QuadricDrawStyle.Point);
//Glu.QuadricDrawStyle(obj, QuadricDrawStyle.Fill);
Glu.QuadricDrawStyle(obj, QuadricDrawStyle.Line);
//画大正方形上可旋转各对象 Draw plane that the objects rest on
GL.PushMatrix();
GL.Color4(0.5f,0.3f, 0.5f, 0.5f); // Blue
GL.Normal3(0.0f, 1.0f, 0.0f);
GL.Begin(BeginMode.Quads);
GL.Vertex3(-10.0f, -2.5f, -10.0f);
GL.Vertex3(-10.0f, -2.5f, 10.0f);
GL.Vertex3(10.0f, -2.5f, 10.0f);
GL.Vertex3(10.0f, -2.5f, -10.0f);
GL.End();
GL.PopMatrix();
//画网线空心球
GL.PushMatrix();
GL.Color3(0.6f, 0.6f, 0.8f);
GL.Translate(0.0f, -3.0f, 0.0f);
Glu.Sphere(obj, 2, 6, 4);//球体-----------------
GL.PopMatrix();
//画立方体(6个正方形) Draw red cube
GL.PushMatrix();
GL.Color3(0.5f, 0.75f, 0.5f);
GL.Translate(0.0f, 3.0f, 0.0f);
GL.Begin(BeginMode.Quads);
//
GL.Normal3(0.0f, 0.0f, -1.0f);
GL.Vertex3(-width, height, -length); //0
GL.Vertex3(width, height, -length); //1
GL.Vertex3(width, -height, -length);//2
GL.Vertex3(-width, -height, -length); //3
//
GL.Normal3(0.0f, 0.0f, 1.0f);
GL.Vertex3(-width, height, length); //4
GL.Vertex3(-width, -height, length); //5
GL.Vertex3(width, -height, length); //6
GL.Vertex3(width, height, length); //7
//
GL.Normal3(0.0f, 1.0f, 0.0f);
GL.Vertex3(-width, height, length); //8 (4)
GL.Vertex3(width, height, length); //9 (6)
GL.Vertex3(width, height, -length); //10 (0)
GL.Vertex3(-width, height, -length); //11 (1)
//
GL.Normal3(0.0f, -1.0f, 0.0f);
GL.Vertex3(-width, -height, length); //12 (5)
GL.Vertex3(-width, -height, -length);//13 (2)
GL.Vertex3(width, -height, -length); //14 (7)
GL.Vertex3(width, -height, length); //15 (3)
//
GL.Normal3(1.0f, 0.0f, 0.0f);
GL.Vertex3(width, height, -length); //16 (1)
GL.Vertex3(width, height, length); //17 (6)
GL.Vertex3(width, -height, length); //18 (3)
GL.Vertex3(width, -height, -length); //19 (7)
//
GL.Normal3(-1.0f, 0.0f, 0.0f);
GL.Vertex3(-width, height, -length); //20 (0)
GL.Vertex3(-width, -height, -length);//21 (2)
GL.Vertex3(-width, -height, length); //22 (4)
GL.Vertex3(-width, height, length); //23 (5)
//
GL.End();
GL.PopMatrix();
//绿色球体 Draw green sphere
GL.PushMatrix();
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Translate(-6.0f, 0.0f, 0.0f);
Glu.Sphere(obj, 2.5f, 8, 12);
GL.PopMatrix();
//黄色锥体 Draw yellow cone
GL.PushMatrix();
GL.Color3(1.0f, 1.0f, 0.0f);
GL.Rotate(-90.0f, 1.0f, 0.0f, 0.0f);
GL.Translate(6.0f, 0.0f, -2.4f);
Glu.Cylinder(obj, 2.5f, 1.0f, 5.0f, 8, 12);
GL.PopMatrix();
//绘制实心圆环 Draw magenta torus
GL.PushMatrix();
GL.Color3(1.0f, 0.0f, 1.0f);
GL.Translate(0.0f, 0.0f, 2.0f);
DrawTorus(5.0f, 1.0f, 20, 20);//绘制实心圆环
GL.PopMatrix();
//绘制八面体 Draw cyan octahedron
GL.PushMatrix();
GL.Color3(0.0f, 1.0f, 1.0f);
GL.Translate(0.0f, -2.0f, 0f);
Glu.Sphere(obj, .5, 4, 2);//绘制八面体
GL.PopMatrix();
}