lg_mesh_lines.c File Reference

Functions
static void	build_base_hexagon (vec3_t *hexagon2, vec3_t v1, vec3_t v2, float line_width)
LG_MeshLine	lg_meshline_new (vec3_t v1, vec3_t v2, int n_seg, float line_width, LG_Color_u c1, LG_Color_u c2, zboolean *is_ok)
int	lg_meshline_set_data (LG_MeshLine *mesh_line, vec3_t v1, vec3_t v2, LG_Color_u c1, LG_Color_u c2)
int	lg_meshline_render (LG_MeshLine *mesh_line, mat4_t *model_view_proj_m)
void	lg_meshline_free (LG_MeshLine *mesh_line)

Detailed Description

=== Trying to find a better alternative to glDrawArrays(GL_LINES) ===

Function Documentation

lg_meshline_new()

LG_MeshLine lg_meshline_new	(	vec3_t	v1,
		vec3_t	v2,
		int	n_seg,
		float	line_width,
		LG_Color_u	c1,
		LG_Color_u	c2,
		zboolean *	is_ok
	)

Create and return a new LG_MeshLine, ie a hexagon-based mesh line, and initialize its renderer (VAO and shader prog)

 base

   x  x (i = 1)
 x      x (i = 0)
   x  x

 n_seg = 2

       x  x
      /  /  x
     x  x  /
    /  /  x
   x  x  /
 x      x
   x  x

You can/should check the value of is_ok

No GL error checking is performed

Parameters

v1
v2
n_seg
line_width
c1	Color of odd segments
c2	Color of even segments
is_ok

Returns

A new LG_MeshLine

lg_meshline_set_data()

int lg_meshline_set_data	(	LG_MeshLine *	mesh_line,
		vec3_t	v1,
		vec3_t	v2,
		LG_Color_u	c1,
		LG_Color_u	c2
	)

Set vbo_data of an already created LG_MeshLine from v1, v2, c1, and c2

Parameters

v1
v2
c1	Color of odd segments
c2	Color of even segments

Returns

Always 0 so far

lg_meshline_render()

int lg_meshline_render	(	LG_MeshLine *	mesh_line,
		mat4_t *	model_view_proj_m
	)

Render a LG_MeshLine

Parameters

mesh_line	Pointer to a LG_MeshLine
model_view_proj_m	Pointer to a mat4_t transform matrix

Returns

0 if OK, -1 on error

lg_meshline_free()

void lg_meshline_free

(

LG_MeshLine *

mesh_line

)

Free a LG_MeshLine renderer resources (VAO, VBO, shader prog, and vbo_data)

Parameters

mesh_line

Pointer to a LG_MeshLine