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09c061e871
This method adds margins to a range whose bounds are equal. Change-Id: I2b2fe26fe431deda112389060d401f738a75b1ae
51 lines
1.7 KiB
C++
51 lines
1.7 KiB
C++
#ifndef SHARED_RANGE_1D_H
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#define SHARED_RANGE_1D_H
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#include <cmath>
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#include <float.h>
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#include <poincare/zoom.h>
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#if __EMSCRIPTEN__
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#include <emscripten.h>
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#include <stdint.h>
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#endif
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namespace Shared {
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/* This class is used in a DataBuffer of a Storage::Record. See comment in
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* Shared::Function::RecordDataBuffer about packing. */
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class __attribute__((packed)) Range1D final {
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public:
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/* If m_min and m_max are too close, we cannot divide properly the range by
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* the number of pixels, which creates a drawing problem. */
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constexpr static float k_minFloat = Poincare::Zoom::k_minimalRangeLength;
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constexpr static float k_default = Poincare::Zoom::k_defaultHalfRange;
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Range1D(float min = -k_default, float max = k_default) :
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m_min(min),
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m_max(max)
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{}
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float min() const { return m_min; }
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float max() const { return m_max; }
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void setMin(float f, float lowerMaxFloat = INFINITY, float upperMaxFloat = INFINITY);
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void setMax(float f, float lowerMaxFloat = INFINITY, float upperMaxFloat = INFINITY);
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static float clipped(float x, bool isMax, float lowerMaxFloat, float upperMaxFloat);
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static float defaultRangeLengthFor(float position);
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private:
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#if __EMSCRIPTEN__
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// See comment about emscripten alignment in Shared::Function::RecordDataBuffer
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static_assert(sizeof(emscripten_align1_short) == sizeof(uint16_t), "emscripten_align1_short should have the same size as uint16_t");
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emscripten_align1_float m_min;
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emscripten_align1_float m_max;
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#else
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float m_min;
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float m_max;
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#endif
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};
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static_assert(Range1D::k_minFloat >= FLT_EPSILON, "InteractiveCurveViewRange's minimal float range is lower than float precision, it might draw uglily curves such as cos(x)^2+sin(x)^2");
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}
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#endif
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