+++ /dev/null
-/* Copyright (C) 2021-2022 Harry Godden (hgn) - All Rights Reserved */
-
-static int debug_lines_enable = 1;
-
-#ifdef VG_3D
- typedef v3f line_co;
-#else
- typedef v2f line_co;
-#endif
-
-SHADER_DEFINE( vg_line_shader,
-#ifdef VG_3D
- "uniform mat4 uPv;"
- "layout (location=0) in vec3 a_co;"
-#else
- "uniform mat3 uPv;"
- "layout (location=0) in vec2 a_co;"
-#endif
- "layout (location=1) in vec4 a_colour;"
- ""
- "out vec4 s_colour;"
- ""
- "void main()"
- "{"
-#ifdef VG_3D
- " vec4 vert_pos = uPv * vec4( a_co, 1.0 );"
-#else
- " vec4 vert_pos = vec4( uPv * vec3( a_co, 1.0 ), 1.0 );"
-#endif
- " s_colour = a_colour;"
- " gl_Position = vert_pos;"
- "}",
-
- // FRAGMENT
- "out vec4 FragColor;"
- ""
- "in vec4 s_colour;"
- ""
- "void main()"
- "{"
- " FragColor = s_colour;"
- "}"
- ,
- UNIFORMS({ "uPv" })
-)
-
-struct
-{
- struct vg_lines_vert
- {
-#ifdef VG_3D
- v3f co;
-#else
- v2f co;
-#endif
-
- u32 colour;
- }
- *buffer;
-
- GLuint vao, vbo;
- u32 draw_idx, cap, buffer_size;
-}
-vg_lines;
-
-static void vg_lines_init(void)
-{
- vg_convar_push( (struct vg_convar){
- .name = "debug_lines",
- .data = &debug_lines_enable,
- .data_type = k_convar_dtype_i32,
- .opt_i32 = { .min=0, .max=1, .clamp=1 },
- .persistent = 1
- });
-
- SHADER_INIT( vg_line_shader );
-
- glGenVertexArrays( 1, &vg_lines.vao );
- glGenBuffers( 1, &vg_lines.vbo );
- glBindVertexArray( vg_lines.vao );
-
- glBindBuffer( GL_ARRAY_BUFFER, vg_lines.vbo );
-
- vg_lines.cap = 50000;
- vg_lines.buffer_size = vg_lines.cap * sizeof( struct vg_lines_vert );
-
- glBufferData( GL_ARRAY_BUFFER, vg_lines.buffer_size, NULL, GL_DYNAMIC_DRAW );
- glBindVertexArray( vg_lines.vao );
-
- glVertexAttribPointer(
- 0,
- sizeof( vg_lines.buffer[0].co ) / sizeof(float),
- GL_FLOAT,
- GL_FALSE,
- sizeof( struct vg_lines_vert ),
- (void *)0
- );
- glEnableVertexAttribArray( 0 );
-
- glVertexAttribPointer(
- 1,
- 4,
- GL_UNSIGNED_BYTE,
- GL_TRUE,
- sizeof( struct vg_lines_vert ),
- (void*)(offsetof( struct vg_lines_vert, colour ))
- );
- glEnableVertexAttribArray( 1 );
- vg_lines.buffer = malloc( vg_lines.buffer_size );
-}
-
-static void vg_lines_free(void)
-{
- glDeleteVertexArrays( 1, &vg_lines.vao );
- glDeleteBuffers( 1, &vg_lines.vbo );
-
- free( vg_lines.buffer );
-}
-
-static void vg_lines_drawall( float* projection )
-{
- SHADER_USE( vg_line_shader );
-
-#ifdef VG_3D
- glUniformMatrix4fv
-#else
- glUniformMatrix3fv
-#endif
- ( SHADER_UNIFORM( vg_line_shader, "uPv" ), 1, GL_FALSE, projection );
-
- glBindVertexArray( vg_lines.vao );
- glBindBuffer( GL_ARRAY_BUFFER, vg_lines.vbo );
-
- glBufferSubData( GL_ARRAY_BUFFER, 0, vg_lines.draw_idx *
- sizeof(struct vg_lines_vert), vg_lines.buffer );
-
- glEnable( GL_BLEND );
- glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
- glBlendEquation( GL_FUNC_ADD );
-
- if( debug_lines_enable )
- glDrawArrays( GL_LINES, 0, vg_lines.draw_idx );
-
- glDisable( GL_BLEND );
- vg_lines.draw_idx = 0;
-}
-
-static void vg_line2( line_co from, line_co to, u32 fc, u32 tc )
-{
- struct vg_lines_vert *v = &vg_lines.buffer[vg_lines.draw_idx];
-
-#ifdef VG_3D
- v3_copy( from, v[0].co );
- v3_copy( to, v[1].co );
-#else
- v2_copy( from, v[0].co );
- v2_copy( to, v[1].co );
-#endif
-
- v[0].colour = fc;
- v[1].colour = tc;
-
- vg_lines.draw_idx += 2;
-}
-
-static void vg_line( line_co from, line_co to, u32 colour )
-{
- vg_line2( from, to, colour, colour );
-}
-
-static void vg_line_box( line_co min, line_co max, u32 colour )
-{
-#ifdef VG_3D
- /* TODO... */
-#else
- vg_line( min, (v2f){min[0],max[1]}, colour );
- vg_line( (v2f){min[0],max[1]}, max, colour );
- vg_line( max, (v2f){max[0],min[1]}, colour );
- vg_line( (v2f){max[0],min[1]}, min, colour );
-#endif
-}
-
-static void vg_line_boxf( boxf box, u32 colour )
-{
- v3f p000, p001, p010, p011, p100, p101, p110, p111;
-
- p000[0]=box[0][0];p000[1]=box[0][1];p000[2]=box[0][2];
- p001[0]=box[0][0];p001[1]=box[0][1];p001[2]=box[1][2];
- p010[0]=box[0][0];p010[1]=box[1][1];p010[2]=box[0][2];
- p011[0]=box[0][0];p011[1]=box[1][1];p011[2]=box[1][2];
-
- p100[0]=box[1][0];p100[1]=box[0][1];p100[2]=box[0][2];
- p101[0]=box[1][0];p101[1]=box[0][1];p101[2]=box[1][2];
- p110[0]=box[1][0];p110[1]=box[1][1];p110[2]=box[0][2];
- p111[0]=box[1][0];p111[1]=box[1][1];p111[2]=box[1][2];
-
- vg_line( p000, p001, colour );
- vg_line( p001, p011, colour );
- vg_line( p011, p010, colour );
- vg_line( p010, p000, colour );
-
- vg_line( p100, p101, colour );
- vg_line( p101, p111, colour );
- vg_line( p111, p110, colour );
- vg_line( p110, p100, colour );
-
- vg_line( p100, p000, colour );
- vg_line( p101, p001, colour );
- vg_line( p110, p010, colour );
- vg_line( p111, p011, colour );
-}
-
-static void vg_line_pt3( v3f pt, float size, u32 colour )
-{
- boxf box =
- {
- { pt[0]-size, pt[1]-size, pt[2]-size },
- { pt[0]+size, pt[1]+size, pt[2]+size }
- };
-
- vg_line_boxf( box, colour );
-}
projects / vg.git / blobdiff