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Add arcs to indicate angle being measured by ruler

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This commit is contained in:
AJ Weeks
2019-10-15 16:47:58 +01:00
parent 119bf23720
commit 59d2c71227
3 changed files with 49 additions and 4 deletions
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38
editor/plugins/canvas_item_editor_plugin.cpp
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@@ -2721,8 +2721,10 @@ void CanvasItemEditor::_draw_ruler_tool() {
viewport->draw_string(font, text_pos, vformat("%.2f px", length_vector.length()), font_color);
if (draw_secondary_lines) {
int horizontal_axis_angle = round(180 * atan2(length_vector.y, length_vector.x) / Math_PI);
int vertictal_axis_angle = 90 - horizontal_axis_angle;
const float horizontal_angle_rad = atan2(length_vector.y, length_vector.x);
const float vertical_angle_rad = Math_PI / 2.0 - horizontal_angle_rad;
const int horizontal_angle = round(180 * horizontal_angle_rad / Math_PI);
const int vertical_angle = round(180 * vertical_angle_rad / Math_PI);
Point2 text_pos2 = text_pos;
text_pos2.x = begin.x < text_pos.x ? MIN(text_pos.x - text_width, begin.x - text_width / 2) : MAX(text_pos.x + text_width, begin.x - text_width / 2);
@@ -2731,7 +2733,7 @@ void CanvasItemEditor::_draw_ruler_tool() {
Point2 v_angle_text_pos = Point2();
v_angle_text_pos.x = CLAMP(begin.x - angle_text_width / 2, angle_text_width / 2, viewport->get_rect().size.x - angle_text_width);
v_angle_text_pos.y = begin.y < end.y ? MIN(text_pos2.y - 2 * text_height, begin.y - text_height * 0.5) : MAX(text_pos2.y + text_height * 3, begin.y + text_height * 1.5);
viewport->draw_string(font, v_angle_text_pos, vformat("%d deg", vertictal_axis_angle), font_secondary_color);
viewport->draw_string(font, v_angle_text_pos, vformat("%d deg", vertical_angle), font_secondary_color);
text_pos2 = text_pos;
text_pos2.y = end.y < text_pos.y ? MIN(text_pos.y - text_height * 2, end.y - text_height / 2) : MAX(text_pos.y + text_height * 2, end.y - text_height / 2);
@@ -2752,7 +2754,35 @@ void CanvasItemEditor::_draw_ruler_tool() {
h_angle_text_pos.y = MIN(text_pos.y - height_multiplier * text_height, MIN(end.y - text_height * 0.5, text_pos2.y - height_multiplier * text_height));
}
}
viewport->draw_string(font, h_angle_text_pos, vformat("%d deg", horizontal_axis_angle), font_secondary_color);
viewport->draw_string(font, h_angle_text_pos, vformat("%d deg", horizontal_angle), font_secondary_color);
// Angle arcs
int arc_point_count = 8;
float arc_radius_max_length_percent = 0.1;
float ruler_length = length_vector.length() * zoom;
float arc_max_radius = 50.0;
float arc_line_width = 2.0;
const Vector2 end_to_begin = (end - begin);
float arc_1_start_angle =
end_to_begin.x < 0 ?
(end_to_begin.y < 0 ? 3.0 * Math_PI / 2.0 - vertical_angle_rad : Math_PI / 2.0) :
(end_to_begin.y < 0 ? 3.0 * Math_PI / 2.0 : Math_PI / 2.0 - vertical_angle_rad);
float arc_1_end_angle = arc_1_start_angle + vertical_angle_rad;
// Constrain arc to triangle height & max size
float arc_1_radius = MIN(MIN(arc_radius_max_length_percent * ruler_length, ABS(end_to_begin.y)), arc_max_radius);
float arc_2_start_angle =
end_to_begin.x < 0 ?
(end_to_begin.y < 0 ? 0.0 : -horizontal_angle_rad) :
(end_to_begin.y < 0 ? Math_PI - horizontal_angle_rad : Math_PI);
float arc_2_end_angle = arc_2_start_angle + horizontal_angle_rad;
// Constrain arc to triangle width & max size
float arc_2_radius = MIN(MIN(arc_radius_max_length_percent * ruler_length, ABS(end_to_begin.x)), arc_max_radius);
viewport->draw_arc(begin, arc_1_radius, arc_1_start_angle, arc_1_end_angle, arc_point_count, ruler_primary_color, Math::round(EDSCALE * arc_line_width));
viewport->draw_arc(end, arc_2_radius, arc_2_start_angle, arc_2_end_angle, arc_point_count, ruler_primary_color, Math::round(EDSCALE * arc_line_width));
}
if (is_snap_active) {