Hi, I'm having a problem moving bugs. I have a draw method which has the code for the texture to be drawn. I have a init method which adds 4 bugs to a list. I have an idle method which is not working (supposed to move the bugs). I load the bugs in a list and in the idle method I create a foreach loop which loops though all bugs in the list, each time supposedly (which doesn't work) translating it using: public void Idle() { foreach (Fly fly in Fly_List) { GL.glPushMatrix(); GL.glTranslatef(fly.SpeedX, fly.SpeedY, 0.0f); GL.glRotatef(CalcAngle(fly.PositionX, fly.PositionY, 0.0f, 0.0f), 0.0f, 0.0f, 1.0f); GL.glPopMatrix(); } }

will share my fileserve account with anyone who can solve this problem;

the code is below:

using System;
using OpenGL;
using System.Windows.Forms;
using System.Drawing;
using System.Collections.Generic;
using System.Linq;
using System.Drawing.Imaging;
using System.Numerics;
using System.Text;



namespace Project3
{
class World
{

#region Member Variables

List<Fly> Fly_List = new List<Fly>();


uint[] m_TextureIDs = new uint[10];


// Mouse
Vector2d m_Point1 = new Vector2d(0.0f, 0.0f);


bool DrawGridBool = false;

float Pie_Size = 0.8f;

float m_TextureXOffset = 0.005f;

Vector2d FlyPos = new Vector2d(1.5f, 1.5f);

int MaxFlyNum = 2;
int CurrentFlyNum = 0;

#endregion

enum GameState
{
Playing,
Paused,
Stopped
}

public void Init()
{
GL.glGenTextures(6, m_TextureIDs);
GL.glEnable(GL.GL_TEXTURE_2D);

LoadTexture("C:\\background.png", 0);

LoadTexture(@"Artwork\Pie\PieMask.bmp", 1);
LoadTexture(@"Artwork\Pie\Pie.bmp", 2);

LoadTexture(@"Artwork\Fly2\FlyMask.bmp", 3);
LoadTexture(@"Artwork\Fly2\Fly.bmp", 4);

LoadTexture(@"Artwork\Finger\FingerMask.bmp", 5);
LoadTexture(@"Artwork\Finger\Finger.bmp", 6);

Fly_List.Add(new Fly(1.5f, 1.5f, 0.005f, 0.005f));
Fly_List.Add(new Fly(-1.5f, -1.5f, 0.005f, 0.005f));
Fly_List.Add(new Fly(-1.5f, 1.5f, 0.005f, 0.005f));
Fly_List.Add(new Fly(1.5f, -1.5f, 0.005f, 0.005f));
}

public void Draw()
{

GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);

GL.glEnable(GL.GL_TEXTURE_2D);

DrawBackground();
DrawPie();

foreach (Fly fly in Fly_List)
{
DrawFly(fly.PositionX, fly.PositionY, fly.SpeedX, fly.SpeedY);
DrawLine(fly.PositionX, fly.PositionY);
}

DrawFinger();
DrawGraph();
}

public void Idle()
{


foreach (Fly fly in Fly_List)
{
GL.glPushMatrix();
GL.glTranslatef(fly.SpeedX, fly.SpeedY, 0.0f);
GL.glRotatef(CalcAngle(fly.PositionX, fly.PositionY, 0.0f, 0.0f), 0.0f, 0.0f, 1.0f);
GL.glPopMatrix();

//fly.PositionX = fly.PositionX - fly.SpeedX;
//fly.PositionY = fly.PositionY - fly.SpeedY;
}
}

public void Exit()
{
GL.glDeleteTextures(6, m_TextureIDs);
}

#region Textures
public void LoadTexture(string FilePath, int TextureID)
{
Bitmap image = new Bitmap(FilePath);
image.RotateFlip(RotateFlipType.RotateNoneFlipX);
BitmapData bitmapdata;
Rectangle rect = new Rectangle(0, 0, image.Width, image.Height);
bitmapdata = image.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[TextureID]);
GL.glTexImage2D(GL.GL_TEXTURE_2D, 0, (int)GL.GL_RGB8, image.Width, image.Height, 0, GL.GL_BGR_EXT, GL.GL_UNSIGNED_byte, bitmapdata.Scan0);
GL.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, (int)GL.GL_LINEAR);
GL.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, (int)GL.GL_LINEAR);

image.UnlockBits(bitmapdata);
image.Dispose();
}

private void DrawBackground()
{
// Background
GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[0]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-2.0f, -2.0f);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-2.0f, 2.0f);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(2.0f, 2.0f);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(2.0f, -2.0f);
GL.glEnd();
}

private void DrawPie()
{
GL.glDisable(GL.GL_DEPTH_TEST);
GL.glEnable(GL.GL_BLEND);

GL.glBlendFunc(GL.GL_DST_COLOR, GL.GL_ZERO); // blend screen colour with black

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[1]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-1.0f, -1.0f);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-1.0f, 1.0f);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(1.0f, 1.0f);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(1.0f, -1.0f);
GL.glEnd();

GL.glBlendFunc(GL.GL_ONE, GL.GL_ONE);

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[2]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-1.0f, -1.0f);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-1.0f, 1.0f);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(1.0f, 1.0f);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(1.0f, -1.0f);
GL.glEnd();

GL.glDisable(GL.GL_BLEND);
GL.glEnable(GL.GL_DEPTH_TEST);
}

private void DrawFly(float pX, float pY, float sX, float sY)
{
GL.glDisable(GL.GL_DEPTH_TEST);
GL.glEnable(GL.GL_BLEND);

GL.glBlendFunc(GL.GL_DST_COLOR, GL.GL_ZERO); // blend screen colour with black

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[3]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-0.10f + pX, -0.10f + pY);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-0.10f + pX, 0.10f + pY);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(0.10f + pX, 0.10f + pY);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(0.10f + pX, -0.10f + pY);
GL.glEnd();

GL.glBlendFunc(GL.GL_ONE, GL.GL_ONE);

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[4]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-0.10f + pX, -0.10f + pY);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-0.10f + pX, 0.10f + pY);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(0.10f + pX, 0.10f + pY);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(0.10f + pX, -0.10f + pY);
GL.glEnd();

GL.glDisable(GL.GL_BLEND);
GL.glEnable(GL.GL_DEPTH_TEST);
}

private void DrawFinger()
{
GL.glDisable(GL.GL_DEPTH_TEST);
GL.glEnable(GL.GL_BLEND);

GL.glBlendFunc(GL.GL_DST_COLOR, GL.GL_ZERO); // blend screen colour with black

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[5]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-0.3f + m_Point1.X, -0.3f + m_Point1.Y);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-0.3f + m_Point1.X, 0.3f + m_Point1.Y);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(0.3f + m_Point1.X, 0.3f + m_Point1.Y);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(0.3f + m_Point1.X, -0.3f + m_Point1.Y);
GL.glEnd();

GL.glBlendFunc(GL.GL_ONE, GL.GL_ONE);

GL.glBindTexture(GL.GL_TEXTURE_2D, m_TextureIDs[6]);
GL.glBegin(GL.GL_QUADS);
GL.glTexCoord2f(0.0f, 0.0f);
GL.glVertex2f(-0.3f + m_Point1.X, -0.3f + m_Point1.Y);
GL.glTexCoord2f(1.0f, 0.0f);
GL.glVertex2f(-0.3f + m_Point1.X, 0.3f + m_Point1.Y);
GL.glTexCoord2f(1.0f, 1.0f);
GL.glVertex2f(0.3f + m_Point1.X, 0.3f + m_Point1.Y);
GL.glTexCoord2f(0.0f, 1.0f);
GL.glVertex2f(0.3f + m_Point1.X, -0.3f + m_Point1.Y);
GL.glEnd();

GL.glDisable(GL.GL_BLEND);
GL.glEnable(GL.GL_DEPTH_TEST);
}

private void DrawGrid()
{
if (DrawGridBool == true)
{
for (float i = -2f; i < 2; i = i + 0.2f)
{
GL.glBegin(GL.GL_LINE_STRIP);
GL.glVertex2f(i, 2.0f);
GL.glVertex2f(i, -2.0f);
GL.glEnd();
}

for (float i = -2f; i < 2; i = i + 0.2f)
{
GL.glBegin(GL.GL_LINE_STRIP);
GL.glVertex2f(-2.0f, i);
GL.glVertex2f(2.0f, i);
GL.glEnd();
}
}
}

private void DrawGraph()
{
// X Axis
GL.glBegin(GL.GL_LINE_STRIP);
GL.glVertex2f(-2.0f, 0.0f);
GL.glVertex2f(2.0f, 0.0f);
GL.glEnd();

// Y Axis
GL.glBegin(GL.GL_LINE_STRIP);
GL.glVertex2f(0.0f, -2.0f);
GL.glVertex2f(0.0f, 2.0f);
GL.glEnd();
}
#endregion

#region Mouse/Keyboard Handling
public void MousePassiveMove(int pX, int pY)
{
m_Point1.X = -2 + (4 * (float)pX / 800);
m_Point1.Y = m_Point1.Y = 2 - (4 * (float)pY / 800);
}

public void MouseClick(int pX, int pY, MouseButtons pButtons)
{
if (pButtons == MouseButtons.Left)
{
if (Pie_Size == 0.4f)
{
// Delete specific texture
// Draw crumbs
MessageBox.Show("");
}
else
{
Pie_Size = Pie_Size - 0.03f;
}
}
}

public void KeyDown(char pKey)
{
if (pKey == '1')
{
DrawGridBool = true;
}
if (pKey == '2')
{
DrawGridBool = false;
}
}
#endregion

#region Other Methods
public float CalcAngle(float x1, float y1, float x2, float y2)
{
float opp;
float adj;
float ang1;

// Calculate vector differences
opp = y1 - y2;
adj = x1 - x2;

if (x1 == x2 && y1 == y2) return (-1);

//trig function to calculate angle
if (adj == 0) // to catch vertical co-ord to prevent division by 0
{
if (opp >= 0)
return (0);
else
return (180);
}
else
{
ang1 = (((float)Math.Atan2(y2, x2) * 180.0f / (float)Math.PI) * -1) - ((float)Math.Atan2(y1, x1) * 180.0f / (float)Math.PI);
}
return (ang1);
}

private void DrawLine(float x, float y)
{
GL.glBegin(GL.GL_LINE_STRIP);
GL.glVertex2f(0.0f, 0.0f); // Origin
GL.glVertex2f(x, y);
GL.glEnd();
}
#endregion
}
}