81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
#pragma once
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#include "blobgroup2.hpp"
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#include <qmatrix4x4.h>
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#include <qquickitem.h>
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class BlobGroup2;
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// Data-only shape.
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//
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// The group draws a single node for the whole group, so a shape here contributes
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// only what the shader needs: position, radii, exclusion, physics. A shape does
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// not create a render node, so no pixel can be evaluated by one shape and missed
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// by another.
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class BlobShape2 : public QQuickItem {
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Q_OBJECT
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Q_PROPERTY(BlobGroup2* group READ group WRITE setGroup NOTIFY groupChanged)
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Q_PROPERTY(qreal radius READ radius WRITE setRadius NOTIFY radiusChanged)
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Q_PROPERTY(
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QMatrix4x4 deformMatrix READ deformMatrix NOTIFY deformMatrixChanged)
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Q_PROPERTY(
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QMatrix4x4 rawDeformMatrix READ rawDeformMatrix NOTIFY
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rawDeformMatrixChanged)
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friend class BlobGroup2;
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public:
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explicit BlobShape2(QQuickItem* parent = nullptr);
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~BlobShape2() override = default;
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[[nodiscard]] BlobGroup2* group() const { return m_group; }
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void setGroup(BlobGroup2* g);
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[[nodiscard]] qreal radius() const { return m_radius; }
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void setRadius(qreal r);
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[[nodiscard]] QMatrix4x4 deformMatrix() const {
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return m_centeredDeformMatrix;
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}
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[[nodiscard]] QMatrix4x4 rawDeformMatrix() const { return m_deformMatrix; }
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signals:
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void groupChanged();
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void radiusChanged();
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void deformMatrixChanged();
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void rawDeformMatrixChanged();
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protected:
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void componentComplete() override;
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void geometryChange(
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const QRectF& newGeometry, const QRectF& oldGeometry) override;
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virtual bool isExcluded(const BlobShape2*) const { return false; }
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// Whether this shape is part of the group's data. Only a pushing shape is, so a shape
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// at rest has no part in the draw. BlobRect2 also honours the QML atRestOverride.
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virtual bool isMoving() const { return false; }
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virtual bool isCornerExcluded(const BlobShape2* /*other*/) const {
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return false;
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}
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virtual void cornerRadii(float out[4]) const;
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// Called by the group when it rebuilds the shared data, once per frame.
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virtual void updatePhysics() {}
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virtual void registerWithGroup();
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virtual void unregisterFromGroup();
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void updateCenteredDeformMatrix();
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BlobGroup2* m_group = nullptr;
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qreal m_radius = 0;
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QMatrix4x4 m_deformMatrix; // identity by default
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QMatrix4x4 m_centeredDeformMatrix;
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};
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