GroundParticleCulling.cpp

浏览该文件的文档.

#include "particles/GroundParticleCulling.h"
 
#include "particles/ParticleEmitter.h"
 
namespace eve::particles {
 
Result<void> applyGroundParticleCulling(ParticleEmitter* emitter, int playerTag, int visitorTag,
                                         bool entered, bool exited) {
    if (!emitter || playerTag == 0 || entered == exited)
        return Result<void>::failure(Diagnostic::error(
            DiagnosticCode::InvalidArgument,
            "particles.groundCulling: emitter, nonzero player tag and one event direction required"));
    if (visitorTag != playerTag) return Result<void>::success();
    if (entered) {
        if (emitter->isStopped()) emitter->start();
    } else if (!emitter->isStopped()) {
        emitter->stop();
    }
    return Result<void>::success();
}
 
}  // namespace eve::particles