Mirrors/overte
3
0
Fork 0
mirror of https://github.com/overte-org/overte.git synced 2025-04-20 03:44:02 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Orient particles to face camera but not roll with it

Browse source
This commit is contained in:
David Rowe 2015-09-23 17:00:07 -07:00
parent 75a9dd13be
commit a2c7b3bcc9
1 changed files with 5 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
View file

@ -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.