to move an object on mouse move inside OpenGL window using windows forms application in vc++.net

EDN Admin · Mar 28, 2011

Hi
I have an opengl window inside a form in VC++.net windows form application.
I have created an object in opengl class and able to display it in the opengl window.
Now , i want to move the object in the opengl window on mouse move.
I have written the code for moving an object in the opengl class.
I am calling this method from Form->mouse move event.
Im able to move the object only when i click the mouse in form.
But my task is to move the object when i click the object.
My piece of code for your reference:
The OpenGL class:
public ref class COpenGL: public System::Windows::Forms::NativeWindow 
{ 
public: 
COpenGL(System::Windows::Forms::Form ^ parentForm, GLsizei iWidth, GLsizei iHeight) 
{ 
CreateParams^ cp = gcnew CreateParams; 
 
// Set the position on the form 
cp->X = 0; 
cp->Y = 0; 
cp->Height = iHeight; 
cp->Width = iWidth; 
 
// Specify the form as the parent. 
cp->Parent = parentForm->Handle; 
 
// Create as a child of the specified parent and make OpenGL compliant (no clipping) 
cp->Style = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN; 
 
// Create the actual window 
this->CreateHandle(cp); 
 
m_hDC = GetDC((HWND)this->Handle.ToPointer()); 
 
if(m_hDC) 
{ 
MySetPixelFormat(m_hDC); 
ReSizeGLScene(iWidth, iHeight); 
InitGL(); 
 
} 
 
/*rtri = 0.0f; 
rquad = 0.0f;*/ 
} 
 
 
System::Void Render(System::Void) 
{ 
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear screen and depth buffer 
 
glLoadIdentity(); // Reset the
current modelview matrix 
glTranslatef(1.5f,0.0f,-7.0f);
 
 
gluLookAt( 
0.0f, 0.0f, 3.0f, 
0.0f, 0.0f, 0.0f, 
0.0f, 1.0f, 0.0f); 
 
glRotatef(xrot, 1.0f, 0.0f, 0.0f); 
glRotatef(yrot, 0.0f, 1.0f, 0.0f);// Move right 1.5 units and into the screen 7.0 
////glRotatef(rquad,1.0f,1.0f,1.0f); // Rotate the quad on the x axis
 
glBegin(GL_QUADS); // Draw a quad 
glColor3f(0.0f,1.0f,0.0f); // Set The color to green 
//glColor3f(1.0f,0.0f,0.0f); 
glVertex3f( 1.0f, 1.0f,-1.0f); // Top Right of the quad (top) 
glVertex3f(-1.0f, 1.0f,-1.0f); // Top Left of the quad (top) 
glVertex3f(-1.0f, 1.0f, 1.0f); // Bottom left of the quad (top) 
glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom right of the quad (top) 
glColor3f(1.0f,0.5f,0.0f); // Set The color to orange 
//glColor3f(1.0f,0.0f,0.0f); 
glVertex3f( 1.0f,-1.0f, 1.0f); // Top Right of the quad (bottom) 
glVertex3f(-1.0f,-1.0f, 1.0f); // Top Left of the quad (bottom) 
glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom left of the quad (bottom) 
glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom right of the quad (bottom) 
glColor3f(1.0f,0.0f,0.0f); // Set The color to red 
glVertex3f( 1.0f, 1.0f, 1.0f); // Top Right of the quad (front) 
glVertex3f(-1.0f, 1.0f, 1.0f); // Top Left of the quad (front) 
glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom left of the quad (front) 
glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom right of the quad (front) 
glColor3f(1.0f,1.0f,0.0f); // Set The color to yellow 
//glColor3f(1.0f,0.0f,0.0f); 
glVertex3f( 1.0f,-1.0f,-1.0f); // Top Right of the quad (back) 
glVertex3f(-1.0f,-1.0f,-1.0f); // Top Left of the quad (back) 
glVertex3f(-1.0f, 1.0f,-1.0f); // Bottom left of the quad (back) 
glVertex3f( 1.0f, 1.0f,-1.0f); // Bottom right of the quad (back) 
glColor3f(0.0f,0.0f,1.0f); // Set The color to blue 
//glColor3f(1.0f,0.0f,0.0f); 
glVertex3f(-1.0f, 1.0f, 1.0f); // Top Right of the quad (left) 
glVertex3f(-1.0f, 1.0f,-1.0f); // Top Left of the quad (left) 
glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom left of the quad (left) 
glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom right of the quad (left) 
glColor3f(1.0f,0.0f,1.0f); // Set The color to violet 
//glColor3f(1.0f,0.0f,0.0f); 
glVertex3f( 1.0f, 1.0f,-1.0f); // Top Right of the quad (right) 
glVertex3f( 1.0f, 1.0f, 1.0f); // Top Left of the quad (right) 
glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom left of the quad (right) 
glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom right of the quad (right) 
glEnd(); 
 
 
 
} 
 
System::Void idle() 
{ 
 
 
 
POINT mouse; // Stores The X And Y Coords For The Current Mouse Position 
GetCursorPos(&mouse); // Gets The Current Cursor Coordinates (Mouse Coordinates) 
 
ScreenToClient((HWND)this->Handle.ToPointer(), &mouse); 
 
GLfloat winX, winY; // Holds Our X, Y and Z Coordinates 
if(mouse.x<=640 && mouse.y<480) 
{ 
winX = (float)mouse.x; // Holds The Mouse X Coordinate 
winY = (float)mouse.y; // Holds The Mouse Y Coordinate 
 
yrot = winX - xdiff; 
xrot = winY - ydiff; 
} 
 
gluLookAt( 
0.0f, 0.0f, 3.0f, 
0.0f, 0.0f, 0.0f, 
0.0f, 1.0f, 0.0f); 
glRotatef(xrot, 1.0f, 0.0f, 0.0f); 
glRotatef(yrot, 0.0f, 1.0f, 0.0f); 
 
}
Im trying to call this idle method from Form1->Form1_MouseMove Event....

can anyone help me in this regard please....

Thanks

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to move an object on mouse move inside OpenGL window using windows forms application in vc++.net

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