lv_math.h
Defines
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LV_TRIGO_SIN_MAX
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LV_TRIGO_SHIFT
LV_TRIGO_SHIFT to normalize
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LV_BEZIER_VAL_MAX
Max time in Bezier functions (not [0..1] to use integers)
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LV_BEZIER_VAL_SHIFT
log2(LV_BEZIER_VAL_MAX): used to normalize up scaled values
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LV_MIN(a, b)
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LV_MIN3(a, b, c)
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LV_MIN4(a, b, c, d)
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LV_MAX(a, b)
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LV_MAX3(a, b, c)
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LV_MAX4(a, b, c, d)
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LV_CLAMP(min, val, max)
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LV_ABS(x)
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LV_UDIV255(x)
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LV_IS_SIGNED(t)
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LV_UMAX_OF(t)
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LV_SMAX_OF(t)
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LV_MAX_OF(t)
Functions
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uint32_t lv_bezier3(uint32_t t, uint32_t u0, uint32_t u1, uint32_t u2, uint32_t u3)
Calculate a value of a Cubic Bezier function.
- Parameters:
t -- time in range of [0..LV_BEZIER_VAL_MAX]
u0 -- start values in range of [0..LV_BEZIER_VAL_MAX]
u1 -- control value 1 values in range of [0..LV_BEZIER_VAL_MAX]
u2 -- control value 2 in range of [0..LV_BEZIER_VAL_MAX]
u3 -- end values in range of [0..LV_BEZIER_VAL_MAX]
- Returns:
the value calculated from the given parameters in range of [0..LV_BEZIER_VAL_MAX]
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uint16_t lv_atan2(int x, int y)
Calculate the atan2 of a vector.
- Parameters:
x --
y --
- Returns:
the angle in degree calculated from the given parameters in range of [0..360]
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int64_t lv_pow(int64_t base, int8_t exp)
Calculate the integer exponents.
- Parameters:
base --
exp --
- Returns:
base raised to the power exponent
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int32_t lv_map(int32_t x, int32_t min_in, int32_t max_in, int32_t min_out, int32_t max_out)
Get the mapped of a number given an input and output range
- Parameters:
x -- integer which mapped value should be calculated
min_in -- min input range
max_in -- max input range
min_out -- max output range
max_out -- max output range
- Returns:
the mapped number
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uint32_t lv_rand(uint32_t min, uint32_t max)
Get a pseudo random number in the given range
- Parameters:
min -- the minimum value
max -- the maximum value
- Returns:
return the random number. min <= return_value <= max
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struct lv_sqrt_res_t