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Smoother camera movement in editor?

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How do most game editors handle camera rotation? I have this right now:

if ( wParam == MK_LBUTTON )
static int lastXPos = GET_X_LPARAM(lParam);
static int lastYPos = GET_Y_LPARAM(lParam);
int xPos = GET_X_LPARAM(lParam);
int yPos = GET_Y_LPARAM(lParam);
g_app->rotateCamera(ice::core::Vector3((float)yPos-(float)lastYPos, (float)xPos-(float)lastXPos, 0).normalize());
lastXPos = xPos;
lastYPos = yPos;

I want something that's not so slow and jumpy though. Any suggestions?

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Store the previous position of the mouse and the new position, each with timestamps.

Interpolate to the position that is 10 or so milliseconds behind the timestamp of the current render.
You do render constantly, yes?

L. Spiro

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