This class defines vector based fill patterns that originated from AutoCAD hatch patterns. The pattern consists of some number of parallel line sets defined within a unit square. They are sets of parallel line patterns which cross at various angles and can be skewed (offset) to a specified distance.

In the following example code for a "brick" hatch pattern, the first line establishes dashes of a length .2 and a spacing of .2 of the unit square. The second line establishes criteria for the arrangement of two sets of parallel lines, dash patterns, that repeat to form the hatch pattern. The first is a horizontal solid line with the origin at 0,0; at an angle of 0d; and, a spacing of .2. The second is a vertical dash line with the origin at 0,0; at an angle of 90d; a spacing of .2; a skew of .2; with a pattern of 2 dashes.
 

float dashes[] = {0.2f, 0.2f};
HT_Parallel_Line_Set lines[] = {
    HT_Parallel_Line_Set (0.0f, 0.0f, 0.0f,       0.2f),
    HT_Parallel_Line_Set (0.0f, 0.0f, 0.5f*HK_Pi, 0.2f, 0.2f, 2, dashes),
};
rendition.set_face_pattern(HT_Hatch_Pattern(2, lines));

This pattern defines a unit square for a "Brick" hatch pattern similar to figure 1.


Figure 1. "Brick" hatch pattern

See Also

count

line_sets

Constructor

HT_Hatch_Pattern

 

Purpose

int count (void) const

Purpose

HT_Hatch_Pattern ()

HEIDI_API HT_Hatch_Pattern (int count, HT_Parallel_Line_Set const * sets,
                                    HT_Boolean copy = HK_True)

Purpose

HT_Parallel_Line_Set const * line_sets (void) const