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Merge pull request #5890 from ctrlaltdavid/20691

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Orient particles to face camera but not roll with it
This commit is contained in:
Brad Hefta-Gaub 2015-09-24 12:49:13 -07:00
commit 19d30bb08b
1 changed files with 5 additions and 2 deletions
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7
libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
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@ -211,9 +211,12 @@ void RenderableParticleEffectEntityItem::updateRenderItem() {
_vertices.clear();
// build vertices from particle positions and radiuses
const glm::vec3 up = frustum->getUp();
const glm::vec3 right = frustum->getRight();
glm::vec3 frustumPosition = frustum->getPosition();
for (auto&& particle : particleDetails) {
glm::vec3 particleDirection = particle.position - frustumPosition;
glm::vec3 right = glm::normalize(glm::cross(glm::vec3(0.0f, 1.0f, 0.0f), particleDirection));
glm::vec3 up = glm::normalize(glm::cross(right, particleDirection));
glm::vec3 upOffset = up * particle.radius;
glm::vec3 rightOffset = right * particle.radius;
// generate corners of quad aligned to face the camera.