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Implement particle bounds with Extents

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This commit is contained in:
Atlante45 2015-11-12 18:23:09 -08:00
parent 9320623ff5
commit a71ed7b166
3 changed files with 15 additions and 50 deletions
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40
libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
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@ -272,37 +272,17 @@ void RenderableParticleEffectEntityItem::updateRenderItem() {
}
// update transform
glm::quat rot = getRotation();
glm::vec3 pos = getPosition();
Transform t;
t.setRotation(rot);
payload.setModelTransform(t);
glm::vec3 position = getPosition();
glm::quat rotation = getRotation();
Transform transform;
transform.setTranslation(position);
transform.setRotation(rotation);
payload.setModelTransform(transform);
// transform _particleMinBound and _particleMaxBound corners into world coords
glm::vec3 d = _particleMaxBound - _particleMinBound;
const size_t NUM_BOX_CORNERS = 8;
glm::vec3 corners[NUM_BOX_CORNERS] = {
pos + rot * (_particleMinBound + glm::vec3(0.0f, 0.0f, 0.0f)),
pos + rot * (_particleMinBound + glm::vec3(d.x, 0.0f, 0.0f)),
pos + rot * (_particleMinBound + glm::vec3(0.0f, d.y, 0.0f)),
pos + rot * (_particleMinBound + glm::vec3(d.x, d.y, 0.0f)),
pos + rot * (_particleMinBound + glm::vec3(0.0f, 0.0f, d.z)),
pos + rot * (_particleMinBound + glm::vec3(d.x, 0.0f, d.z)),
pos + rot * (_particleMinBound + glm::vec3(0.0f, d.y, d.z)),
pos + rot * (_particleMinBound + glm::vec3(d.x, d.y, d.z))
};
glm::vec3 min(FLT_MAX, FLT_MAX, FLT_MAX);
glm::vec3 max = -min;
for (size_t i = 0; i < NUM_BOX_CORNERS; i++) {
min.x = std::min(min.x, corners[i].x);
min.y = std::min(min.y, corners[i].y);
min.z = std::min(min.z, corners[i].z);
max.x = std::max(max.x, corners[i].x);
max.y = std::max(max.y, corners[i].y);
max.z = std::max(max.z, corners[i].z);
}
AABox bound(min, max - min);
payload.setBound(bound);
AABox bounds(_particlesBounds);
bounds.rotate(rotation);
bounds.shiftBy(position);
payload.setBound(bounds);
bool textured = _texture && _texture->isLoaded();
if (textured) {

19
libraries/entities/src/ParticleEffectEntityItem.cpp
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@ -121,8 +121,6 @@ ParticleEffectEntityItem::ParticleEffectEntityItem(const EntityItemID& entityIte
_alphaStarts(DEFAULT_MAX_PARTICLES, DEFAULT_ALPHA),
_alphaMiddles(DEFAULT_MAX_PARTICLES, DEFAULT_ALPHA),
_alphaFinishes(DEFAULT_MAX_PARTICLES, DEFAULT_ALPHA),
_particleMaxBound(glm::vec3(1.0f, 1.0f, 1.0f)),
_particleMinBound(glm::vec3(-1.0f, -1.0f, -1.0f)) ,
_additiveBlending(DEFAULT_ADDITIVE_BLENDING)
{
@ -631,15 +629,6 @@ void ParticleEffectEntityItem::updateAlpha(quint32 index, float age) {
_alphaFinishes[index], age);
}
void ParticleEffectEntityItem::extendBounds(const glm::vec3& point) {
_particleMinBound.x = glm::min(_particleMinBound.x, point.x);
_particleMinBound.y = glm::min(_particleMinBound.y, point.y);
_particleMinBound.z = glm::min(_particleMinBound.z, point.z);
_particleMaxBound.x = glm::max(_particleMaxBound.x, point.x);
_particleMaxBound.y = glm::max(_particleMaxBound.y, point.y);
_particleMaxBound.z = glm::max(_particleMaxBound.z, point.z);
}
void ParticleEffectEntityItem::integrateParticle(quint32 index, float deltaTime) {
glm::vec3 accel = _particleAccelerations[index];
glm::vec3 atSquared = (0.5f * deltaTime * deltaTime) * accel;
@ -649,9 +638,7 @@ void ParticleEffectEntityItem::integrateParticle(quint32 index, float deltaTime)
}
void ParticleEffectEntityItem::stepSimulation(float deltaTime) {
_particleMinBound = glm::vec3(-1.0f, -1.0f, -1.0f);
_particleMaxBound = glm::vec3(1.0f, 1.0f, 1.0f);
_particlesBounds.reset();
// update particles between head and tail
for (quint32 i = _particleHeadIndex; i != _particleTailIndex; i = (i + 1) % _maxParticles) {
@ -667,7 +654,7 @@ void ParticleEffectEntityItem::stepSimulation(float deltaTime) {
updateColor(i, age);
updateAlpha(i, age);
integrateParticle(i, deltaTime);
extendBounds(_particlePositions[i]);
_particlesBounds.addPoint(_particlePositions[i]);
}
}
@ -766,7 +753,7 @@ void ParticleEffectEntityItem::stepSimulation(float deltaTime) {
_particleAccelerations[i] = _emitAcceleration + randFloatInRange(-1.0f, 1.0f) * _accelerationSpread;
}
integrateParticle(i, timeLeftInFrame);
extendBounds(_particlePositions[i]);
_particlesBounds.addPoint(_particlePositions[i]);
// Color
if (_colorSpread == xColor{ 0, 0, 0 }) {

6
libraries/entities/src/ParticleEffectEntityItem.h
View file

@ -224,7 +224,6 @@ protected:
void updateRadius(quint32 index, float age);
void updateColor(quint32 index, float age);
void updateAlpha(quint32 index, float age);
void extendBounds(const glm::vec3& point);
void integrateParticle(quint32 index, float deltaTime);
quint32 getLivingParticleCount() const;
// the properties of this entity
@ -289,9 +288,8 @@ protected:
quint32 _particleTailIndex = 0;
// bounding volume
glm::vec3 _particleMaxBound;
glm::vec3 _particleMinBound;
Extents _particlesBounds;
bool _additiveBlending;
};