model animation | GameDev.net

Fluid FX · 2002-08-03T09:10:37+00:00

Dear people, on most codes i saw for md2 or md3, they were not time based or anything like it.. so my question is, is this code the best? or .. int FramePerSecondA = 25; int FrameTick = 1/FramePerSecondA; int TStart, TEnd, TCounter; render() { start = timeGetTime(); TCounter += TEnd-TStart; if(TCounter => FrameTick){ UpdateModelFrames(); TCounter = TCounter - FrameTick; } render + models; end = timeGetTime(); } DrawModels() { here will be said that for example next frame should …

Sure that works, however you should probably store the times as floats or doubles (1/25 < 1).

This is how I was doing it (note the frames & frame times were per-model-instance):

  
float framePeriod = 1 / framesPerSecond;
float currentTime = framePeriod;  // do this in code really

int currentFrame = 0;

void MainLoop(void)
{
  float end = timeGetTime();

  while(1)
  {
    float start = timeGetTime();

    Update(end - start);

    end = start;
  }

}

void Update(float deltaTime)
{
  currentTime -= deltaTime;

  if(currentTime <= 0.0)
  { 
    currentTime += framePeriod;
    currentFrame++;  
    // handle frame sequence wrapping etc. here

  }

    
}

void RenderModel(void)
{
   md2->DrawFrame(currentFrame);
}

[edited by - JuNC on August 4, 2002 10:05:46 AM]

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