Provided by: allegro5-doc_5.2.6.0-1_all bug


       al_draw_polyline - Allegro 5 API


              #include <allegro5/allegro_primitives.h>

              void al_draw_polyline(const float* vertices, int vertex_stride,
                 int vertex_count, int join_style, int cap_style,
                 ALLEGRO_COLOR color, float thickness, float miter_limit)


       Draw a series of line segments.

       · vertices - Interleaved array of (x, y) vertex coordinates

       · vertex_stride - the number of bytes between pairs of vertices (the stride)

       · vertex_count - Number of vertices in the array

       · join_style  -  Member  of  ALLEGRO_LINE_JOIN(3alleg5) specifying how to render the joins
         between line segments

       · cap_style - Member of ALLEGRO_LINE_CAP(3alleg5) specifying how to render the end caps

       · color - Color of the line

       · thickness - Thickness of the line, pass <= 0 to draw hairline lines

       · miter_limit - Parameter for miter join style

       The stride is normally 2 * sizeof(float) but may be more if the vertex coordinates are  in
       an array of some structure type, e.g.

              struct VertexInfo {
                 float x;
                 float y;
                 int id;

              void my_draw(struct VertexInfo verts[], int vertex_count, ALLEGRO_COLOR c)
                 al_draw_polyline((float *)verts, sizeof(VertexInfo), vertex_count,
                    ALLEGRO_LINE_JOIN_NONE, ALLEGRO_LINE_CAP_NONE, c, 1.0, 1.0);

       The stride may also be negative if the vertices are stored in reverse order.




       al_draw_polygon(3alleg5), ALLEGRO_LINE_JOIN(3alleg5), ALLEGRO_LINE_CAP(3alleg5)