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SourceVuESP-IDF Framework and Examplesi80_controller samplelv_point_array_transform()

lv_point_array_transform() function

Transform an array of points

Syntax

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Summary

Declaration

Definition

from lv_area.h:186

void lv_point_array_transform(lv_point_t * points, size_t count, int32_t angle, int32_t scale_x, int32_t scale_y, const lv_point_t * pivot, bool zoom_first);

Implemented in lv_area.c:449

Arguments

Argument

Description

points

pointer to an array of points

count

number of points in the array

angle

angle with 0.1 resolutions (123 means 12.3°)

scale_x

horizontal zoom, 256 means 100%

scale_y

vertical zoom, 256 means 100%

pivot

pointer to the pivot point of the transformation

zoom_first

true: zoom first and rotate after that; else: opposite order

References

Code

Location

Referrer

void lv_point_array_transform(lv_point_t * points, size_t count, int32_t angle, int32_t scale_x, int32_t scale_y,

lv_area.c:449

void lv_point_array_transform(lv_point_t * points, size_t count, int32_t angle, int32_t scale_x, int32_t scale_y,

lv_area.h:186

lv_point_array_transform(point, 1, angle, scale_x, scale_y, pivot, zoom_first);

lv_area.c:446

lv_point_transform()

lv_point_array_transform(p, p_count, angle, scale_x, scale_y, &pivot, !inv);

lv_obj_pos.c:1182

transform_point_array()

Call Tree

lv_point_array_transform() is called by 2 functions and calls 1 function:

lv_point_transform()

transform_point_array()

lv_point_array_transform()

lv_trigo_sin()

Data Use

lv_point_array_transform() reads 2 variables and writes 2 variables:

lv_point_t::x

lv_point_t::y

lv_point_array_transform()

lv_point_t::x

lv_point_t::y

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