82f1814add1126f90df1dc98abfc3967f6be4515
1 /* Copyright (C) 2021-2022 Harry Godden (hgn) - All Rights Reserved */
8 static int debug_lines_enable
= 1;
16 static struct vg_shader _shader_lines
=
27 "layout (location=0) in vec3 a_co;"
30 "layout (location=0) in vec2 a_co;"
32 "layout (location=1) in vec4 a_colour;"
39 " vec4 vert_pos = uPv * vec4( a_co, 1.0 );"
41 " vec4 vert_pos = vec4( uPv * vec3( a_co, 1.0 ), 1.0 );"
43 " s_colour = a_colour;"
44 " gl_Position = vert_pos;"
58 " FragColor = s_colour;"
78 u32 draw_idx
, cap
, buffer_size
;
82 static void vg_lines_init(void)
84 vg_info( "vg_lines_init\n" );
86 vg_convar_push( (struct vg_convar
){
87 .name
= "debug_lines",
88 .data
= &debug_lines_enable
,
89 .data_type
= k_convar_dtype_i32
,
90 .opt_i32
= { .min
=0, .max
=1, .clamp
=1 },
94 vg_shader_register( &_shader_lines
);
96 vg_acquire_thread_sync();
98 glGenVertexArrays( 1, &vg_lines
.vao
);
99 glGenBuffers( 1, &vg_lines
.vbo
);
100 glBindVertexArray( vg_lines
.vao
);
101 glBindBuffer( GL_ARRAY_BUFFER
, vg_lines
.vbo
);
103 vg_lines
.cap
= 50000;
104 vg_lines
.buffer_size
= vg_lines
.cap
* sizeof( struct vg_lines_vert
);
106 glBufferData( GL_ARRAY_BUFFER
, vg_lines
.buffer_size
,
107 NULL
, GL_DYNAMIC_DRAW
);
108 glBindVertexArray( vg_lines
.vao
);
112 glVertexAttribPointer(
114 sizeof( vg_lines
.buffer
[0].co
) / sizeof(float),
117 sizeof( struct vg_lines_vert
),
120 glEnableVertexAttribArray( 0 );
122 glVertexAttribPointer(
127 sizeof( struct vg_lines_vert
),
128 (void*)(offsetof( struct vg_lines_vert
, colour
))
130 glEnableVertexAttribArray( 1 );
135 vg_lines
.buffer
= vg_alloc( vg_lines
.buffer_size
);
136 vg_success( "done\n" );
139 vg_release_thread_sync();
142 static void vg_lines_free(void *nothing
)
144 glDeleteVertexArrays( 1, &vg_lines
.vao
);
145 glDeleteBuffers( 1, &vg_lines
.vbo
);
146 vg_free( vg_lines
.buffer
);
149 static void vg_lines_drawall( float* projection
)
151 glUseProgram( _shader_lines
.id
);
158 ( glGetUniformLocation( _shader_lines
.id
, "uPv" ), 1, GL_FALSE
, projection
);
160 glBindVertexArray( vg_lines
.vao
);
161 glBindBuffer( GL_ARRAY_BUFFER
, vg_lines
.vbo
);
163 glBufferSubData( GL_ARRAY_BUFFER
, 0, vg_lines
.draw_idx
*
164 sizeof(struct vg_lines_vert
), vg_lines
.buffer
);
166 glEnable( GL_BLEND
);
167 glBlendFunc( GL_SRC_ALPHA
, GL_ONE_MINUS_SRC_ALPHA
);
168 glBlendEquation( GL_FUNC_ADD
);
170 if( debug_lines_enable
)
171 glDrawArrays( GL_LINES
, 0, vg_lines
.draw_idx
);
173 glDisable( GL_BLEND
);
174 vg_lines
.draw_idx
= 0;
177 static void vg_line2( line_co from
, line_co to
, u32 fc
, u32 tc
)
179 struct vg_lines_vert
*v
= &vg_lines
.buffer
[vg_lines
.draw_idx
];
182 v3_copy( from
, v
[0].co
);
183 v3_copy( to
, v
[1].co
);
185 v2_copy( from
, v
[0].co
);
186 v2_copy( to
, v
[1].co
);
192 vg_lines
.draw_idx
+= 2;
195 static void vg_line( line_co from
, line_co to
, u32 colour
)
197 vg_line2( from
, to
, colour
, colour
);
200 static void vg_line_box( line_co min
, line_co max
, u32 colour
)
205 vg_line( min
, (v2f
){min
[0],max
[1]}, colour
);
206 vg_line( (v2f
){min
[0],max
[1]}, max
, colour
);
207 vg_line( max
, (v2f
){max
[0],min
[1]}, colour
);
208 vg_line( (v2f
){max
[0],min
[1]}, min
, colour
);
212 static void vg_line_boxf( boxf box
, u32 colour
)
214 v3f p000
, p001
, p010
, p011
, p100
, p101
, p110
, p111
;
216 p000
[0]=box
[0][0];p000
[1]=box
[0][1];p000
[2]=box
[0][2];
217 p001
[0]=box
[0][0];p001
[1]=box
[0][1];p001
[2]=box
[1][2];
218 p010
[0]=box
[0][0];p010
[1]=box
[1][1];p010
[2]=box
[0][2];
219 p011
[0]=box
[0][0];p011
[1]=box
[1][1];p011
[2]=box
[1][2];
221 p100
[0]=box
[1][0];p100
[1]=box
[0][1];p100
[2]=box
[0][2];
222 p101
[0]=box
[1][0];p101
[1]=box
[0][1];p101
[2]=box
[1][2];
223 p110
[0]=box
[1][0];p110
[1]=box
[1][1];p110
[2]=box
[0][2];
224 p111
[0]=box
[1][0];p111
[1]=box
[1][1];p111
[2]=box
[1][2];
226 vg_line( p000
, p001
, colour
);
227 vg_line( p001
, p011
, colour
);
228 vg_line( p011
, p010
, colour
);
229 vg_line( p010
, p000
, colour
);
231 vg_line( p100
, p101
, colour
);
232 vg_line( p101
, p111
, colour
);
233 vg_line( p111
, p110
, colour
);
234 vg_line( p110
, p100
, colour
);
236 vg_line( p100
, p000
, colour
);
237 vg_line( p101
, p001
, colour
);
238 vg_line( p110
, p010
, colour
);
239 vg_line( p111
, p011
, colour
);
242 static void vg_line_boxf_transformed( m4x3f m
, boxf box
, u32 colour
)
244 v3f p000
, p001
, p010
, p011
, p100
, p101
, p110
, p111
;
246 p000
[0]=box
[0][0];p000
[1]=box
[0][1];p000
[2]=box
[0][2];
247 p001
[0]=box
[0][0];p001
[1]=box
[0][1];p001
[2]=box
[1][2];
248 p010
[0]=box
[0][0];p010
[1]=box
[1][1];p010
[2]=box
[0][2];
249 p011
[0]=box
[0][0];p011
[1]=box
[1][1];p011
[2]=box
[1][2];
251 p100
[0]=box
[1][0];p100
[1]=box
[0][1];p100
[2]=box
[0][2];
252 p101
[0]=box
[1][0];p101
[1]=box
[0][1];p101
[2]=box
[1][2];
253 p110
[0]=box
[1][0];p110
[1]=box
[1][1];p110
[2]=box
[0][2];
254 p111
[0]=box
[1][0];p111
[1]=box
[1][1];p111
[2]=box
[1][2];
256 m4x3_mulv( m
, p000
, p000
);
257 m4x3_mulv( m
, p001
, p001
);
258 m4x3_mulv( m
, p010
, p010
);
259 m4x3_mulv( m
, p011
, p011
);
260 m4x3_mulv( m
, p100
, p100
);
261 m4x3_mulv( m
, p101
, p101
);
262 m4x3_mulv( m
, p110
, p110
);
263 m4x3_mulv( m
, p111
, p111
);
265 vg_line( p000
, p001
, colour
);
266 vg_line( p001
, p011
, colour
);
267 vg_line( p011
, p010
, colour
);
268 vg_line( p010
, p000
, colour
);
270 vg_line( p100
, p101
, colour
);
271 vg_line( p101
, p111
, colour
);
272 vg_line( p111
, p110
, colour
);
273 vg_line( p110
, p100
, colour
);
275 vg_line( p100
, p000
, colour
);
276 vg_line( p101
, p001
, colour
);
277 vg_line( p110
, p010
, colour
);
278 vg_line( p111
, p011
, colour
);
280 vg_line( p000
, p110
, colour
);
281 vg_line( p100
, p010
, colour
);
284 static void vg_line_cross(v3f pos
,u32 colour
, float scale
)
287 v3_add( (v3f
){ scale
,0.0f
,0.0f
}, pos
, p0
);
288 v3_add( (v3f
){-scale
,0.0f
,0.0f
}, pos
, p1
);
289 vg_line( p0
, p1
, colour
);
290 v3_add( (v3f
){0.0f
, scale
,0.0f
}, pos
, p0
);
291 v3_add( (v3f
){0.0f
,-scale
,0.0f
}, pos
, p1
);
292 vg_line( p0
, p1
, colour
);
293 v3_add( (v3f
){0.0f
,0.0f
, scale
}, pos
, p0
);
294 v3_add( (v3f
){0.0f
,0.0f
,-scale
}, pos
, p1
);
295 vg_line( p0
, p1
, colour
);
298 static void vg_line_pt3( v3f pt
, float size
, u32 colour
)
302 { pt
[0]-size
, pt
[1]-size
, pt
[2]-size
},
303 { pt
[0]+size
, pt
[1]+size
, pt
[2]+size
}
306 vg_line_boxf( box
, colour
);
309 #endif /* VG_LINES_H */