672a59e84d663b76fa407310d7ca0bc57e27c2e8
1 /* Copyright (C) 2021-2022 Harry Godden (hgn) - All Rights Reserved */
10 static struct vg_shader _shader_lines
=
20 "layout (location=0) in vec3 a_co;"
21 "layout (location=1) in vec4 a_colour;"
27 " vec4 vert_pos = uPv * vec4( a_co, 1.0 );"
28 " s_colour = a_colour;"
29 " gl_Position = vert_pos;"
43 " FragColor = s_colour;"
65 VG_STATIC
void vg_lines_init(void)
67 vg_info( "vg_lines_init\n" );
69 vg_convar_push( (struct vg_convar
){
71 .data
= &vg_lines
.draw
,
72 .data_type
= k_convar_dtype_i32
,
73 .opt_i32
= { .min
=0, .max
=1, .clamp
=1 },
77 vg_shader_register( &_shader_lines
);
79 vg_acquire_thread_sync();
81 glGenVertexArrays( 1, &vg_lines
.vao
);
82 glGenBuffers( 1, &vg_lines
.vbo
);
83 glBindVertexArray( vg_lines
.vao
);
84 glBindBuffer( GL_ARRAY_BUFFER
, vg_lines
.vbo
);
86 u32 size
= 50000 * sizeof( struct vg_lines_vert
);
88 vg_lines
.vertex_buffer
=
89 vg_create_linear_allocator(vg_mem
.rtmemory
, size
, VG_MEMORY_REALTIME
);
91 glBufferData( GL_ARRAY_BUFFER
, size
, NULL
, GL_DYNAMIC_DRAW
);
92 glBindVertexArray( vg_lines
.vao
);
96 glVertexAttribPointer(
101 sizeof( struct vg_lines_vert
),
104 glEnableVertexAttribArray( 0 );
106 glVertexAttribPointer(
111 sizeof( struct vg_lines_vert
),
112 (void*)(offsetof( struct vg_lines_vert
, colour
))
114 glEnableVertexAttribArray( 1 );
117 vg_success( "done\n" );
120 vg_release_thread_sync();
121 vg_lines
.allow_input
= 1;
124 VG_STATIC
void vg_lines_drawall( float* projection
)
126 glUseProgram( _shader_lines
.id
);
129 ( glGetUniformLocation( _shader_lines
.id
, "uPv" ), 1, GL_FALSE
, projection
);
131 glBindVertexArray( vg_lines
.vao
);
132 glBindBuffer( GL_ARRAY_BUFFER
, vg_lines
.vbo
);
134 u32 bufusage
= vg_linear_get_cur(vg_lines
.vertex_buffer
);
136 glBufferSubData( GL_ARRAY_BUFFER
, 0, bufusage
, vg_lines
.vertex_buffer
);
138 glEnable( GL_BLEND
);
139 glBlendFunc( GL_SRC_ALPHA
, GL_ONE_MINUS_SRC_ALPHA
);
140 glBlendEquation( GL_FUNC_ADD
);
143 glDrawArrays( GL_LINES
, 0, bufusage
/ sizeof(struct vg_lines_vert
) );
145 glDisable( GL_BLEND
);
146 vg_linear_clear( vg_lines
.vertex_buffer
);
149 VG_STATIC
void vg_line2( line_co from
, line_co to
, u32 fc
, u32 tc
)
151 if( !vg_lines
.allow_input
)
154 u32 size
= 2 * sizeof(struct vg_lines_vert
);
155 struct vg_lines_vert
*v
= vg_linear_alloc( vg_lines
.vertex_buffer
, size
);
157 v3_copy( from
, v
[0].co
);
158 v3_copy( to
, v
[1].co
);
164 VG_STATIC
void vg_line( line_co from
, line_co to
, u32 colour
)
166 vg_line2( from
, to
, colour
, colour
);
169 VG_STATIC
void vg_line_boxf( boxf box
, u32 colour
)
171 v3f p000
, p001
, p010
, p011
, p100
, p101
, p110
, p111
;
173 p000
[0]=box
[0][0];p000
[1]=box
[0][1];p000
[2]=box
[0][2];
174 p001
[0]=box
[0][0];p001
[1]=box
[0][1];p001
[2]=box
[1][2];
175 p010
[0]=box
[0][0];p010
[1]=box
[1][1];p010
[2]=box
[0][2];
176 p011
[0]=box
[0][0];p011
[1]=box
[1][1];p011
[2]=box
[1][2];
178 p100
[0]=box
[1][0];p100
[1]=box
[0][1];p100
[2]=box
[0][2];
179 p101
[0]=box
[1][0];p101
[1]=box
[0][1];p101
[2]=box
[1][2];
180 p110
[0]=box
[1][0];p110
[1]=box
[1][1];p110
[2]=box
[0][2];
181 p111
[0]=box
[1][0];p111
[1]=box
[1][1];p111
[2]=box
[1][2];
183 vg_line( p000
, p001
, colour
);
184 vg_line( p001
, p011
, colour
);
185 vg_line( p011
, p010
, colour
);
186 vg_line( p010
, p000
, colour
);
188 vg_line( p100
, p101
, colour
);
189 vg_line( p101
, p111
, colour
);
190 vg_line( p111
, p110
, colour
);
191 vg_line( p110
, p100
, colour
);
193 vg_line( p100
, p000
, colour
);
194 vg_line( p101
, p001
, colour
);
195 vg_line( p110
, p010
, colour
);
196 vg_line( p111
, p011
, colour
);
199 VG_STATIC
void vg_line_boxf_transformed( m4x3f m
, boxf box
, u32 colour
)
201 v3f p000
, p001
, p010
, p011
, p100
, p101
, p110
, p111
;
203 p000
[0]=box
[0][0];p000
[1]=box
[0][1];p000
[2]=box
[0][2];
204 p001
[0]=box
[0][0];p001
[1]=box
[0][1];p001
[2]=box
[1][2];
205 p010
[0]=box
[0][0];p010
[1]=box
[1][1];p010
[2]=box
[0][2];
206 p011
[0]=box
[0][0];p011
[1]=box
[1][1];p011
[2]=box
[1][2];
208 p100
[0]=box
[1][0];p100
[1]=box
[0][1];p100
[2]=box
[0][2];
209 p101
[0]=box
[1][0];p101
[1]=box
[0][1];p101
[2]=box
[1][2];
210 p110
[0]=box
[1][0];p110
[1]=box
[1][1];p110
[2]=box
[0][2];
211 p111
[0]=box
[1][0];p111
[1]=box
[1][1];p111
[2]=box
[1][2];
213 m4x3_mulv( m
, p000
, p000
);
214 m4x3_mulv( m
, p001
, p001
);
215 m4x3_mulv( m
, p010
, p010
);
216 m4x3_mulv( m
, p011
, p011
);
217 m4x3_mulv( m
, p100
, p100
);
218 m4x3_mulv( m
, p101
, p101
);
219 m4x3_mulv( m
, p110
, p110
);
220 m4x3_mulv( m
, p111
, p111
);
222 vg_line( p000
, p001
, colour
);
223 vg_line( p001
, p011
, colour
);
224 vg_line( p011
, p010
, colour
);
225 vg_line( p010
, p000
, colour
);
227 vg_line( p100
, p101
, colour
);
228 vg_line( p101
, p111
, colour
);
229 vg_line( p111
, p110
, colour
);
230 vg_line( p110
, p100
, colour
);
232 vg_line( p100
, p000
, colour
);
233 vg_line( p101
, p001
, colour
);
234 vg_line( p110
, p010
, colour
);
235 vg_line( p111
, p011
, colour
);
237 vg_line( p000
, p110
, colour
);
238 vg_line( p100
, p010
, colour
);
241 VG_STATIC
void vg_line_cross(v3f pos
,u32 colour
, float scale
)
244 v3_add( (v3f
){ scale
,0.0f
,0.0f
}, pos
, p0
);
245 v3_add( (v3f
){-scale
,0.0f
,0.0f
}, pos
, p1
);
246 vg_line( p0
, p1
, colour
);
247 v3_add( (v3f
){0.0f
, scale
,0.0f
}, pos
, p0
);
248 v3_add( (v3f
){0.0f
,-scale
,0.0f
}, pos
, p1
);
249 vg_line( p0
, p1
, colour
);
250 v3_add( (v3f
){0.0f
,0.0f
, scale
}, pos
, p0
);
251 v3_add( (v3f
){0.0f
,0.0f
,-scale
}, pos
, p1
);
252 vg_line( p0
, p1
, colour
);
255 VG_STATIC
void vg_line_pt3( v3f pt
, float size
, u32 colour
)
259 { pt
[0]-size
, pt
[1]-size
, pt
[2]-size
},
260 { pt
[0]+size
, pt
[1]+size
, pt
[2]+size
}
263 vg_line_boxf( box
, colour
);
266 #endif /* VG_LINES_H */