scalarfillmaterial.h

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#ifndef OPENSWMM_MAP_SCALARFILLMATERIAL_H
#define OPENSWMM_MAP_SCALARFILLMATERIAL_H
 
#include <QSGGeometry>
#include <QSGMaterial>
 
class QSGTexture;
 
struct ScalarFillVertex
{
    float x = 0.0f;
    float y = 0.0f;
    float value = 0.0f;
};
 
const QSGGeometry::AttributeSet &scalarFillAttributes();
 
class ScalarFillMaterial : public QSGMaterial
{
public:
    ScalarFillMaterial();
    ~ScalarFillMaterial() override;   // destroyed on the render thread with
                                      // its node — deleting the texture here
                                      // is safe.
 
    [[nodiscard]] QSGMaterialType *type() const override;
    [[nodiscard]] int compare(const QSGMaterial *other) const override;
    [[nodiscard]] QSGMaterialShader *
        createShader(QSGRendererInterface::RenderMode) const override;
 
    void setRampTexture(QSGTexture *texture);
    [[nodiscard]] QSGTexture *rampTexture() const { return m_texture; }
 
    void setRange(float vMin, float vMax);
    [[nodiscard]] float vMin() const { return m_vMin; }
    [[nodiscard]] float invRange() const { return m_invRange; }
 
private:
    QSGTexture *m_texture  = nullptr;
    float       m_vMin     = 0.0f;
    float       m_invRange = 1.0f;
};
 
#endif // OPENSWMM_MAP_SCALARFILLMATERIAL_H