53 lines
1.0 KiB
C++
53 lines
1.0 KiB
C++
#ifndef LLMR_MAP_TRANSFORM
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#define LLMR_MAP_TRANSFORM
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#include <cstdint>
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namespace llmr {
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class tile;
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class transform {
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public:
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transform();
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// Relative changes
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void moveBy(double dx, double dy);
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void scaleBy(double ds, double cx, double cy);
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void rotateBy(double cx, double cy, double sx, double sy, double ex, double ey);
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// Absolute changes
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void setScale(double scale);
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void setAngle(double angle);
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void setZoom(double zoom);
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void setLonLat(double lon, double lat);
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// Getters
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void matrixFor(float matrix[16], uint32_t z, uint32_t x, uint32_t y) const;
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void getLonLat(double& lon, double& lat) const;
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private:
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double pixel_x() const;
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double pixel_y() const;
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public:
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uint32_t width;
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uint32_t height;
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private:
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double x, y; // pixel values of the map center in the current scale
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double angle;
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double scale;
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// tile size
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const int32_t size = 512;
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// cache values for spherical mercator math
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double zc, Bc, Cc;
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};
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}
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#endif
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