al_draw_prim
int al_draw_prim(const void* vtxs, const ALLEGRO_VERTEX_DECL* decl,
ALLEGRO_BITMAP* texture, int start, int end, int type)
Draws a subset of the passed vertex buffer.
Parameters:
- texture - Texture to use, pass 0 to use only color shaded primitves
- vtxs - Pointer to an array of vertices
- decl - Pointer to a vertex declaration. If set to NULL, the vertices are assumed to be of the ALLEGRO_VERTEX type
- start - Start index of the subset of the vertex buffer to draw
- end - One past the last index of subset of the vertex buffer to draw
- type - Primitive type to draw
Returns: Number of primitives drawn
For example to draw a textured triangle you could use:
ALLEGRO_VERTEX v[] = {
{.x = 128, .y = 0, .z = 0, .u = 128, .v = 0},
{.x = 0, .y = 256, .z = 0, .u = 0, .v = 256},
{.x = 256, .y = 256, .z = 0, .u = 256, .v = 256}};
al_draw_prim(v, NULL, texture, 0, 3, ALLEGRO_PRIM_TRIANGLE_LIST);See also: ALLEGRO_VERTEX, ALLEGRO_PRIM_TYPE, ALLEGRO_VERTEX_DECL, al_draw_indexed_prim
Examples: ex_gp2xwiz, ex_prim
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