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Fix segfault for glTF animations not keyframed at 0

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When loading glTF animations we lerp between keyframes, and previously
assume that if the frame we are considering has a later keyframe, there
must be a previous keyframe. This is not true if the animation's first
keyframe is some time into the animation. In this case we now
effectively clamp to that first keyframe for any time prior to it.
This commit is contained in:
Chris Sinclair 2021-02-23 17:11:18 +00:00
parent 6c67ef3da0
commit 6322facb53
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GPG Key ID: 5C323201E3EF4E75
1 changed files with 2 additions and 2 deletions
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4
src/models.c
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@ -4120,11 +4120,11 @@ static ModelAnimation* LoadGLTFModelAnimations(const char *fileName, int *animCo
if (frameTime < inputFrameTime)
{
shouldSkipFurtherTransformation = false;
outputMin = j - 1;
outputMin = (j == 0) ? 0 : j - 1;
outputMax = j;
float previousInputTime = 0.0f;
if (GltfReadFloat(sampler->input, j - 1, (float*)&previousInputTime, 1))
if (GltfReadFloat(sampler->input, outputMin, (float*)&previousInputTime, 1))
{
lerpPercent = (frameTime - previousInputTime) / (inputFrameTime - previousInputTime);
}