//控件大小调整事件
//改变大小时触发，在程序启动时将执行一次
private void glControl1_Resize(object sender, EventArgs e)
{
if (!GLLoaded)//如果没有加载控件，则返回
{
return;
}
if (glControl1.ClientSize.Height == 0)
{
glControl1.ClientSize = new System.Drawing.Size(glControl1.ClientSize.Width, 1);
}
GL.Viewport(0, 0, glControl1.ClientSize.Width, glControl1.ClientSize.Height);
//设置3D绘图画布
float aspect_ratio = Width / (float)Height;//求得控件宽高比
//三维透视矩阵
Matrix4 perpective = Matrix4.CreatePerspectiveFieldOfView(PerpectAngle,
aspect_ratio, DisNear, DisFar);
GL.MatrixMode(MatrixMode.Projection);
GL.LoadMatrix(ref perpective);//加载透视矩阵
//创建轨迹球
_ArcBall = new ArcBall(-Eye_distance, -Eye_distance,
Eye_distance, 0, 0, 0, 0, 0, 1);
_ArcBall.SetBounds(Width, Height);//设置高宽
}
private void openGLControl1_OpenGLInitialized(object sender, EventArgs e)
{
var gl = openGLControl1.OpenGL;
gl.Viewport(0, 0, openGLControl1.Width, openGLControl1.Height);
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.LoadIdentity();
gl.Perspective(90, (float)openGLControl1.Width / openGLControl1.Height, 1, 1000);
gl.LookAt(-200, 0, 50, 0, 0, 0, 0, 0, 1);
gl.ShadeModel(OpenGL.GL_SMOOTH);
var mat_specular = new[] { 1.0f, 1.0f, 1.0f, 1.0f };
var mat_ambient = new[] { 0.2f, 0.2f, 0.2f, 0.2f };
var mat_diffuse = new[] { 2.0f, 2.0f, 2.0f, 0.1f };
var mat_shininess = new[] { 100.0f };
gl.Material(OpenGL.GL_FRONT, OpenGL.GL_SPECULAR, mat_specular);
gl.Material(OpenGL.GL_FRONT, OpenGL.GL_AMBIENT, mat_ambient);
gl.Material(OpenGL.GL_FRONT, OpenGL.GL_DIFFUSE, mat_diffuse);
gl.Material(OpenGL.GL_FRONT, OpenGL.GL_SHININESS, mat_shininess);
var ambientLight = new[] { 0.2f, 0.2f, 0.2f, 0.2f };
var diffuseLight = new[] { 1.0f, 1.0f, 1.0f, 1.0f };
var posLight0 = new[] { -200.0f, 200.0f, 200f, 1.0f };
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_AMBIENT, ambientLight);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_DIFFUSE, diffuseLight);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_POSITION, posLight0);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_LIGHT0);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_DOUBLEBUFFER);
ArcBall.SetBounds(openGLControl1.Width, openGLControl1.Height);
}
