Question

基本上，我试图在Widows Forms上实时创建一个glControl窗口。我这样做是因为我将使用多个窗口，而且更有可能重新调整其位置，我不想手动执行此操作。

我不明白为什么我的代码不起作用。这是：

using System;
using System.Drawing;
using System.Windows.Forms;

using System.Diagnostics;

using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Platform;

namespace Draw3Dv01wf
{
    public partial class Form1 : Form
    {
        GLControl renderCanvas1;
        int winX, winY, winW, winH;

        public Form1()
        {
            // required method for designer support
            InitializeComponent();
        }


        // load event handler
        private void Form1_Load(object sender, EventArgs e)
        {
            // create and setup gl.control windows
            this.renderCanvas1 = new GLControl();
            //this.SuspendLayout();

            winX = this.Location.X; winY = this.Location.Y;
            winW = this.Width; winH = this.Height;

            this.renderCanvas1.BackColor = System.Drawing.Color.CadetBlue;
            this.renderCanvas1.Location = 
                new System.Drawing.Point(winX + 50, winY + 50);
            this.renderCanvas1.Name = "renderCanvas1";
            this.renderCanvas1.Size = new System.Drawing.Size(winW/3, winH/2);
            this.renderCanvas1.TabIndex = 1;
            this.renderCanvas1.VSync = false;
            this.renderCanvas1.Load += 
                new System.EventHandler(this.renderCanvas_Load);
            this.renderCanvas1.Paint += 
                new System.Windows.Forms.PaintEventHandler(
                    this.renderCanvas_Paint);
            //renderCanvas1.Paint += renderCanvas_Paint;
            //this.ResumeLayout(false);
        }

        private void renderCanvas_Paint(object sender, PaintEventArgs e)
        {
            GL.Viewport(winX + 20, winY + 25, Width, Height);

            // Clear the render canvas with the current color
            GL.Clear(
                ClearBufferMask.ColorBufferBit | 
                ClearBufferMask.DepthBufferBit);

            GL.Flush();
            renderCanvas1.SwapBuffers();
        }

        private void renderCanvas_Load(object sender, EventArgs e)
        {
            // Specify the color for clearing
            GL.ClearColor(Color.SkyBlue);
        }
    }
}

我刚看到窗户就形成了。 glControl窗口不显示。但是，当我手动将glControl添加到表单时，添加以下代码：

    //____________________________________________

    private void glControl1_Load(object sender, EventArgs e)
    {
        // Specify the color for clearing
        GL.ClearColor(Color.SkyBlue);

        this.Paint += new PaintEventHandler(glControl1_Paint);
    }

    private void glControl1_Paint(object sender, PaintEventArgs e)
    {
        GL.Viewport(this.Location.X, this.Location.Y, Width, Height);

        // Clear the render canvas with the current color
        GL.Clear(
            ClearBufferMask.ColorBufferBit |
            ClearBufferMask.DepthBufferBit);

        GL.Flush();
        glControl1.SwapBuffers();
    }

    //________________________________________________________

...此窗口显示在表单上。

我的程序中的代码与设计器中的代码没有什么不同，所以我完全不解。

这是设计师代码：

    this.glControl1 = new OpenTK.GLControl();
    this.SuspendLayout();
    // 
    // glControl1
    // 
    this.glControl1.BackColor = System.Drawing.Color.Black;
    this.glControl1.Location = new System.Drawing.Point(385, 12);
    this.glControl1.Name = "glControl1";
    this.glControl1.Size = new System.Drawing.Size(476, 284);
    this.glControl1.TabIndex = 0;
    this.glControl1.VSync = false;
    this.glControl1.Load += new System.EventHandler(this.glControl1_Load);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.BackColor = System.Drawing.SystemColors.Desktop;
    this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
    this.ClientSize = new System.Drawing.Size(1264, 681);
    this.Controls.Add(this.glControl1);
    this.HelpButton = true;
    this.MaximumSize = new System.Drawing.Size(3840, 2160);
    this.MinimumSize = new System.Drawing.Size(640, 480);
    this.Name = "Form1";
    this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
    this.Text = "Draw3D";
    this.ResumeLayout(false);

Answer 1

我通过创建另一个glControl尝试了一些东西，但这一次，不是在Form的Load事件处理程序中。

public Form1()
{
    // required method for designer support
    InitializeComponent();
    initSetup();
}

private void initSetup()
{
    winX = this.Location.X; winY = this.Location.Y;
    winW = this.Width; winH = this.Height;

    this.renderCanvas2 = new GLControl();
    this.renderCanvas2.BackColor = System.Drawing.Color.DeepSkyBlue;
    this.renderCanvas2.Location =
        new System.Drawing.Point(winX + 150, winY + 150);
    this.renderCanvas2.Name = "renderCanvas2";
    this.renderCanvas2.Size = 
        new System.Drawing.Size(winW / 2, winH / 2);
    this.renderCanvas2.TabIndex = 1;
    this.renderCanvas2.VSync = false;
    this.renderCanvas2.Load +=
        new System.EventHandler(this.renderCanvas2_Load);
    this.renderCanvas2.Paint +=
        new System.Windows.Forms.PaintEventHandler(
            this.renderCanvas2_Paint);

    this.Controls.Add(this.renderCanvas2);
}

......它奏效了。我不知道为什么会这样。它还导致手动创建的glControl窗口变为黑色 - 在其原始位置，或白色 - 如果移动。但是，至少我得到了结果。我会继续玩它，看看我能弄清楚什么。我感觉它可能与缓冲有关。我的另一个选择是手动创建窗口，并通过代码调整它们的位置和大小，因为这也有效。如果有人知道，我仍然欢迎任何有关代码在Form的加载事件处理程序中不起作用的输入。感谢

修改我正在取得进步。我只有最后一步。所以现在我使用一组glControl来创建我的窗口，但是我并不想创建多个事件处理程序来管理每个窗口，所以我试图只用一个Load事件和一个Paint事件来获得结果。但是，我在所有窗口上设置颜色时遇到问题。我不确定这种方法是否可行。我真的很感激这方面的任何帮助。这是我的测试代码：

using... namespace Draw3Dv01wf { public partial class Form1 : Form { GLControl[] renderCanvas = new GLControl[10]; private int winX, winY, winW, winH, winDist, winNum, aCol, rCol, gCol, bCol; Random randNum = new Random(); //byte[] num = new byte[255]; byte r, g, b, a; Color4 winCol; private bool winCreated; private bool eHandlerIs; TextBox tb = new TextBox(); public Form1() { // required method for designer support InitializeComponent(); initSetup(); } private void initSetup() { winX = this.Location.X; winY = this.Location.Y; winW = this.Width; winH = this.Height; rCol = 255; gCol = 255; bCol = 255; aCol = 255; // debugging text tb.Location = new Point(5, 5); tb.Size = new Size(200, 15); tb.Name = "textBox1"; tb.TabIndex = 0; tb.BackColor = Color.Black; tb.ForeColor = Color.White; tb.Text = winNum.ToString(); this.Controls.Add(this.tb); // create windows for (int w=0; w<8; w++) { // window distance winDist += 32; // make sure window with index 0 is created if (winCreated) { winNum += 1; } // create windows this.renderCanvas[w] = new GLControl(); //this.SuspendLayout(); this.renderCanvas[w].BackColor = System.Drawing.Color.DeepSkyBlue; this.renderCanvas[w].Location = new System.Drawing.Point(winX + winDist, winY + winDist); this.renderCanvas[w].Name = "renderCanvas" + w; this.renderCanvas[w].Size = new System.Drawing.Size(winW / 2, winH / 2); this.renderCanvas[w].TabIndex = 1; this.renderCanvas[w].VSync = false; // create event handler this.renderCanvas[w].Load += new System.EventHandler(this.renderCanvas_Load); if (!eHandlerIs) { this.renderCanvas[w].Paint += new System.Windows.Forms.PaintEventHandler( this.renderCanvas_Paint); //eHandlerIs = true; } //this.ResumeLayout(false); // add specified control to the control collection this.Controls.Add(this.renderCanvas[w]); winCreated = true; // first window created } } private void renderCanvas_Paint(object sender, PaintEventArgs e) { tb.Text = r.ToString(); if (winNum < 7) { //GL.Viewport( // renderCanvas[winNum].Location.X, // renderCanvas[winNum].Location.Y, Width, Height); //// Clear the render canvas with the current color //GL.Clear( // ClearBufferMask.ColorBufferBit | // ClearBufferMask.DepthBufferBit); //GL.Flush(); //renderCanvas[winNum].SwapBuffers(); } else if (winNum >= 7) { for (int w = 0; w < 8; w++) { GL.Viewport( renderCanvas[w].Location.X, renderCanvas[w].Location.Y, Width, Height); // Clear the render canvas with the current color GL.Clear( ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit); GL.Flush(); renderCanvas[w].SwapBuffers(); } } } private void renderCanvas_Load(object sender, EventArgs e) { // randomize color (min & max int) rCol = randNum.Next(100, 255); gCol = randNum.Next(100, 255); bCol = randNum.Next(100, 255); aCol = 255; // convert int to (32) byte r = (byte)(rCol >> 32); g = (byte)(gCol >> 32); b = (byte)(bCol >> 32); a = (byte)(aCol >> 32); // window final color winCol = new Color4(r, g, b, a); // Specify the color for clearing GL.ClearColor(winCol); } } }

......结果如下：

只有一个窗口有颜色。所有其他都变黑了。我感谢任何反馈。

修改知道了！ MakeCurrent救援。 void OpenTK.GLControl.MakeCurrent（）
在调用线程中使基础此GLControl当前。发布的所有OpenGL命令此后由此GLControl解释。以下是代码的更新：

GLControl[] renderCanvas = new GLControl[10]; private int winX, winY, winW, winH, winDist, winNum, win, aCol, rCol, gCol, bCol; Random randNum = new Random(); //byte[] num = new byte[255]; byte r, g, b, a; Color4 winCol; private bool winCreated; private bool eHandlerIs; TextBox tb = new TextBox(); public Form1() { // required method for designer support InitializeComponent(); initSetup(); } private void initSetup() { winX = this.Location.X; winY = this.Location.Y; winW = this.Width; winH = this.Height; rCol = 255; gCol = 255; bCol = 255; aCol = 255; // debugging text tb.Location = new Point(5, 5); tb.Size = new Size(200, 15); tb.Name = "textBox1"; tb.TabIndex = 0; tb.BackColor = Color.Black; tb.ForeColor = Color.White; tb.Text = winNum.ToString(); this.Controls.Add(this.tb); // create windows for (int w=0; w<8; w++) { // window distance winDist += 32; // make sure window with index 0 is created if (winCreated) { winNum += 1; } // create windows this.renderCanvas[w] = new GLControl(); //this.SuspendLayout(); this.renderCanvas[w].BackColor = System.Drawing.Color.DeepSkyBlue; this.renderCanvas[w].Location = new System.Drawing.Point(winX + winDist, winY + winDist); this.renderCanvas[w].Name = "renderCanvas" + w; this.renderCanvas[w].Size = new System.Drawing.Size(winW / 2, winH / 2); this.renderCanvas[w].TabIndex = 1; this.renderCanvas[w].VSync = false; // create event handler this.renderCanvas[w].Load += new System.EventHandler(this.renderCanvas_Load); if (!eHandlerIs) { this.renderCanvas[w].Paint += new System.Windows.Forms.PaintEventHandler( this.renderCanvas_Paint); //eHandlerIs = true; } //this.ResumeLayout(false); // add specified control to the control collection this.Controls.Add(this.renderCanvas[w]); winCreated = true; // first window created } } private void renderCanvas_Paint(object sender, PaintEventArgs e) { tb.Text = r.ToString(); if (winNum < 7) { } else if (winNum >= 7) { for (int w = 0; w < 8; w++) { for (int n = 0; n < 8; n++) { if (w != n) { if (renderCanvas[n].Created && renderCanvas[n].Context.IsCurrent) { renderCanvas[n].Context.MakeCurrent(null); } } } if (renderCanvas[w].Context.IsCurrent == false) { renderCanvas[w].MakeCurrent(); } GL.Viewport( renderCanvas[w].Location.X, renderCanvas[w].Location.Y, Width, Height); // Clear the render canvas with the current color GL.Clear( ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit); GL.Flush(); renderCanvas[w].SwapBuffers(); } } } private void renderCanvas_Load(object sender, EventArgs e) { // randomize color (min & max int) rCol = randNum.Next(100, 255); gCol = randNum.Next(100, 255); bCol = randNum.Next(100, 255); aCol = 255; // convert int to (32) byte r = (byte)(rCol >> 32); g = (byte)(gCol >> 32); b = (byte)(bCol >> 32); a = (byte)(aCol >> 32); // window final color winCol = new Color4(r, g, b, a); for (int n = 0; n < 8; n++) { if (win != n) { if (renderCanvas[n].Created && renderCanvas[n].Context.IsCurrent) { renderCanvas[n].Context.MakeCurrent(null); } } } if (renderCanvas[win].Context.IsCurrent == false) { renderCanvas[win].MakeCurrent(); } // Specify the color for clearing GL.ClearColor(winCol); win += 1; }

......结果：

实时创建glControl窗口

1 个答案: