Implement a camera shake
Modulate the normal movement of the camera with high-frequency, low amplitude sines/cosines, perhaps?
My way of doing this was to take several random points in a certain radius, and then construct a spline based on them. Using TCB you can choose proper coefficients for desired smoothness/"sharpness".
Then use it as an offset for, say, 3 seconds long amount of time.
Then use it as an offset for, say, 3 seconds long amount of time.
Here's a small sample from my engine's API. I have incorporated shaking into Renderer class.
Header:
Implementation:
Sample usage:
You can see how this this shake looks in real world game - it's been used in "Herbata Kto Ty Tak Kroliczk" (link in sig).
HTH :-)
Header:
//! Only sets some values, actual shaking will appear on the next frame and will last for _time miliseconds. void ShakeScreen(int _factorX, int _factorY, ulint _time); void SetShakeBoundaries(int _boundaryX, int _boundaryY) { boundaryX = _boundaryX; boundaryY = _boundaryY; } //! Immediately sets shake screen state to given _state void SetShakeScreenState(bool _state) { shakeScreenEnabled = _state; } //! Returns actual shake screen state bool GetShakeScreenState() const { return shakeScreenEnabled; } void UpdateShakeState(); // ------------------------------------------------- private: bool shakeScreenEnabled; float shakeFactorX, shakeFactorY; TimeMarker shakeStart; ulint shakeTime; int boundaryX, boundaryY;Implementation:
// ------------------------------------------------- start Rendervoid SC :: Renderer :: Render() { if (shakeScreenEnabled && shakeTime) { UpdateShakeState(); } SDL_GL_SwapBuffers(); }// ------------------------------------------------- end Render// ------------------------------------------------- start ShakeScreen void SC :: Renderer :: ShakeScreen(int _factorX, int _factorY, ulint _time) { // multiple users can call ShakeScreen, screen should be shaked for the longest time if (shakeTime == 0) { shakeTime = _time; glPushMatrix(); shakeStart.Mark(); } else { shakeTime = Max(shakeTime, _time); } shakeFactorX += _factorX; shakeFactorY += _factorY; } // ------------------------------------------------- end ShakeScreen// ------------------------------------------------- start UpdateShakeStatevoid SC :: Renderer :: UpdateShakeState() { if (shakeStart.HasElapsed(shakeTime)) { shakeTime = 0; shakeStart.Reset(); glPopMatrix(); shakeFactorX = 0; shakeFactorY = 0; return; } else { int sign = 1; if (getRandGen.Integer(100) > 50) sign = -1; glPopMatrix(); glPushMatrix(); float timeLeft = ( (float) shakeTime - (float) shakeStart.HowManyElapsed() + 1) / 1000.0f; float shakeX = sign * timeLeft * (getRandGen.FloatingPoint( shakeFactorX * 8 ) / 8) ; float shakeY = sign * timeLeft * (getRandGen.FloatingPoint( shakeFactorY * 8 ) / 8) ; shakeX -= 10 * getTimer.GetDeltaTime(); shakeY -= 10 * getTimer.GetDeltaTime(); shakeX = ClampTo(shakeX, (float) -boundaryX, (float) boundaryX); shakeY = ClampTo(shakeY, (float) -boundaryY, (float) boundaryY); glTranslatef( shakeX, shakeY, 0 ); } } // ------------------------------------------------- end UpdateShakeStateSample usage:
if ( getInput.GetMouseButtonNowPressed(mb_Left) ) getRenderer.ShakeScreen(2, 2, 15000); // will shake a little for 15 secondsYou can see how this this shake looks in real world game - it's been used in "Herbata Kto Ty Tak Kroliczk" (link in sig).
HTH :-)
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