| /* |
| * Copyright 2019 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkParticleAffector_DEFINED |
| #define SkParticleAffector_DEFINED |
| |
| #include "modules/particles/include/SkReflected.h" |
| |
| #include "include/core/SkPoint.h" |
| #include "modules/particles/include/SkParticleData.h" |
| |
| struct SkColorCurve; |
| struct SkCurve; |
| |
| class SkParticleAffector : public SkReflected { |
| public: |
| REFLECTED_ABSTRACT(SkParticleAffector, SkReflected) |
| |
| void apply(const SkParticleUpdateParams& params, SkParticleState ps[], int count); |
| void visitFields(SkFieldVisitor* v) override; |
| |
| static void RegisterAffectorTypes(); |
| |
| // Affectors that can set the linear or angular velocity. Both have a 'force' option to apply |
| // the resulting value as a force, rather than directly setting the velocity. |
| static sk_sp<SkParticleAffector> MakeLinearVelocity(const SkCurve& angle, |
| const SkCurve& strength, |
| bool force, |
| SkParticleFrame frame); |
| static sk_sp<SkParticleAffector> MakeAngularVelocity(const SkCurve& strength, |
| bool force); |
| |
| // Set the orientation of a particle, relative to the world, local, or velocity frame. |
| static sk_sp<SkParticleAffector> MakeOrientation(const SkCurve& angle, |
| SkParticleFrame frame); |
| |
| static sk_sp<SkParticleAffector> MakePointForce(SkPoint point, SkScalar constant, |
| SkScalar invSquare); |
| |
| static sk_sp<SkParticleAffector> MakeSize(const SkCurve& curve); |
| static sk_sp<SkParticleAffector> MakeFrame(const SkCurve& curve); |
| static sk_sp<SkParticleAffector> MakeColor(const SkColorCurve& curve); |
| |
| private: |
| virtual void onApply(const SkParticleUpdateParams& params, SkParticleState ps[], int count) = 0; |
| |
| bool fEnabled = true; |
| }; |
| |
| #endif // SkParticleAffector_DEFINED |