SetRotationByVelocityMode
This function switches between two particle rotation modes: rotate by velocity and rotate by rotation speed.
Syntax
- SetRotationByVelocityMode(bool index)
Parameters
- index: - Differentiates between two particle rotation modes: 0 = rotate by rotation speed, 1 = rotate by velocity.
Remarks
When particles are rotated by velocity, it is assumed that the direction the particle is pointing is to the right.
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Rotate by velocity should be used anytime that particles need to face the direction that they are heading.
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Particles not rotating by velocity. Arrows are not pointing in the direction that they are heading.
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Particles rotating by velocity.
Example
#include "Leadwerks.h"
using namespace Leadwerks;
int main(int argc, const char *argv[])
{
Leadwerks::Window* window = Leadwerks::Window::Create();
Context* context = Context::Create(window);
World* world = World::Create();
Camera* camera = Camera::Create();
camera->Move(0, 0, -3);
//Create an emitter
Emitter* emitter = Emitter::Create(500);
Material* material = Material::Load("Materials/Effects/spark.mat");
if (material)
{
emitter->SetMaterial(material);
material->Release();
}
emitter->SetVelocity(0, 0, 0, 0);
emitter->SetVelocity(8, 8, 0, 1);
emitter->SetRotationByVelocityMode(true);
emitter->SetEmissionVolume(0, 0, 0);
while (true)
{
if (window->Closed() || window->KeyDown(Key::Escape)) return false;
Leadwerks::Leadwerks::Time::Update();
world->Update();
world->Render();
//Press space to toggle mode
if (window->KeyHit(Key::Space))
{
emitter->SetRotationByVelocityMode(!emitter->GetRotationByVelocityMode());
}
context->Sync();
}
}