X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=vg_lines.h;fp=vg_lines.h;h=672a59e84d663b76fa407310d7ca0bc57e27c2e8;hb=4c48fe01a5d1983be89b7dce6f08e6b708cfbb05;hp=0000000000000000000000000000000000000000;hpb=3dd767bb10e6fee9cbffeb185d1a9685810c17b5;p=vg.git diff --git a/vg_lines.h b/vg_lines.h new file mode 100644 index 0000000..672a59e --- /dev/null +++ b/vg_lines.h @@ -0,0 +1,266 @@ +/* Copyright (C) 2021-2022 Harry Godden (hgn) - All Rights Reserved */ + +#ifndef VG_LINES_H +#define VG_LINES_H + +#include "vg/vg.h" + +typedef v3f line_co; + +static struct vg_shader _shader_lines = +{ + .name = "[vg] lines", + .link = NULL, + .vs = + { + .orig_file = NULL, + .static_src = + + "uniform mat4 uPv;" + "layout (location=0) in vec3 a_co;" + "layout (location=1) in vec4 a_colour;" + "" + "out vec4 s_colour;" + "" + "void main()" + "{" + " vec4 vert_pos = uPv * vec4( a_co, 1.0 );" + " s_colour = a_colour;" + " gl_Position = vert_pos;" + "}" + }, + .fs = + { + .orig_file = NULL, + .static_src = + + "out vec4 FragColor;" + "" + "in vec4 s_colour;" + "" + "void main()" + "{" + " FragColor = s_colour;" + "}" + } +}; + + +struct +{ + u32 draw, + allow_input; + + struct vg_lines_vert + { + v3f co; + u32 colour; + } + *vertex_buffer; + + GLuint vao, vbo; +} +static vg_lines; + +VG_STATIC void vg_lines_init(void) +{ + vg_info( "vg_lines_init\n" ); + + vg_convar_push( (struct vg_convar){ + .name = "vg_lines", + .data = &vg_lines.draw, + .data_type = k_convar_dtype_i32, + .opt_i32 = { .min=0, .max=1, .clamp=1 }, + .persistent = 1 + }); + + vg_shader_register( &_shader_lines ); + + vg_acquire_thread_sync(); + { + glGenVertexArrays( 1, &vg_lines.vao ); + glGenBuffers( 1, &vg_lines.vbo ); + glBindVertexArray( vg_lines.vao ); + glBindBuffer( GL_ARRAY_BUFFER, vg_lines.vbo ); + + u32 size = 50000 * sizeof( struct vg_lines_vert ); + + vg_lines.vertex_buffer = + vg_create_linear_allocator(vg_mem.rtmemory, size, VG_MEMORY_REALTIME); + + glBufferData( GL_ARRAY_BUFFER, size, NULL, GL_DYNAMIC_DRAW ); + glBindVertexArray( vg_lines.vao ); + VG_CHECK_GL_ERR(); + + /* Pointers */ + glVertexAttribPointer( + 0, + 3, + 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_CHECK_GL_ERR(); + vg_success( "done\n" ); + } + + vg_release_thread_sync(); + vg_lines.allow_input = 1; +} + +VG_STATIC void vg_lines_drawall( float* projection ) +{ + glUseProgram( _shader_lines.id ); + + glUniformMatrix4fv + ( glGetUniformLocation( _shader_lines.id, "uPv" ), 1, GL_FALSE, projection ); + + glBindVertexArray( vg_lines.vao ); + glBindBuffer( GL_ARRAY_BUFFER, vg_lines.vbo ); + + u32 bufusage = vg_linear_get_cur(vg_lines.vertex_buffer); + + glBufferSubData( GL_ARRAY_BUFFER, 0, bufusage, vg_lines.vertex_buffer ); + + glEnable( GL_BLEND ); + glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); + glBlendEquation( GL_FUNC_ADD ); + + if( vg_lines.draw ) + glDrawArrays( GL_LINES, 0, bufusage / sizeof(struct vg_lines_vert) ); + + glDisable( GL_BLEND ); + vg_linear_clear( vg_lines.vertex_buffer ); +} + +VG_STATIC void vg_line2( line_co from, line_co to, u32 fc, u32 tc ) +{ + if( !vg_lines.allow_input ) + return; + + u32 size = 2 * sizeof(struct vg_lines_vert); + struct vg_lines_vert *v = vg_linear_alloc( vg_lines.vertex_buffer, size ); + + v3_copy( from, v[0].co ); + v3_copy( to, v[1].co ); + + v[0].colour = fc; + v[1].colour = tc; +} + +VG_STATIC void vg_line( line_co from, line_co to, u32 colour ) +{ + vg_line2( from, to, colour, colour ); +} + +VG_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 ); +} + +VG_STATIC void vg_line_boxf_transformed( m4x3f m, 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]; + + m4x3_mulv( m, p000, p000 ); + m4x3_mulv( m, p001, p001 ); + m4x3_mulv( m, p010, p010 ); + m4x3_mulv( m, p011, p011 ); + m4x3_mulv( m, p100, p100 ); + m4x3_mulv( m, p101, p101 ); + m4x3_mulv( m, p110, p110 ); + m4x3_mulv( m, p111, p111 ); + + 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 ); + + vg_line( p000, p110, colour ); + vg_line( p100, p010, colour ); +} + +VG_STATIC void vg_line_cross(v3f pos,u32 colour, float scale) +{ + v3f p0, p1; + v3_add( (v3f){ scale,0.0f,0.0f}, pos, p0 ); + v3_add( (v3f){-scale,0.0f,0.0f}, pos, p1 ); + vg_line( p0, p1, colour ); + v3_add( (v3f){0.0f, scale,0.0f}, pos, p0 ); + v3_add( (v3f){0.0f,-scale,0.0f}, pos, p1 ); + vg_line( p0, p1, colour ); + v3_add( (v3f){0.0f,0.0f, scale}, pos, p0 ); + v3_add( (v3f){0.0f,0.0f,-scale}, pos, p1 ); + vg_line( p0, p1, colour ); +} + +VG_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 ); +} + +#endif /* VG_LINES_H */