gui.h

   1 #ifndef GUI_H
   2 #define GUI_H
   3
   4 #include "font.h"
   5
   6 struct{
   7    struct gui_helper{
   8       const char *bindstr, *text;
   9    }
  10    helpers[4];
  11    u32 helper_count;
  12
  13    char location[64];
  14    f64  location_time;
  15
  16    f32 factive;
  17    font3d font;
  18 }
  19 static gui;
  20
  21 VG_STATIC
  22 void gui_draw(void)
  23 {
  24    camera ortho;
  25
  26    float fl = 0.0f,
  27          fr = vg.window_x,
  28          fb = 0.0f,
  29          ft = vg.window_y,
  30          rl = 1.0f / (fr-fl),
  31          tb = 1.0f / (ft-fb);
  32
  33    m4x4_zero( ortho.mtx.p );
  34    ortho.mtx.p[0][0] = 2.0f * rl;
  35    ortho.mtx.p[1][1] = 2.0f * tb;
  36    ortho.mtx.p[3][0] = (fr + fl) * -rl;
  37    ortho.mtx.p[3][1] = (ft + fb) * -tb;
  38    ortho.mtx.p[3][3] = 1.0f;
  39    m4x3_identity( ortho.transform );
  40    camera_update_view( &ortho );
  41    m4x4_mul( ortho.mtx.p, ortho.mtx.v, ortho.mtx.pv );   /* HACK */
  42    camera_finalize( &ortho );
  43
  44    gui.factive = vg_lerpf( gui.factive, gui.helper_count?1.0f:0.0f,
  45                            vg.time_delta*2.0f );
  46
  47    if( gui.factive > 0.01f ){
  48       /* draw bottom bar */
  49       glEnable(GL_BLEND);
  50       glDisable(GL_DEPTH_TEST);
  51       glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
  52       glBlendEquation(GL_FUNC_ADD);
  53
  54       shader_blitcolour_use();
  55       shader_blitcolour_uColour( (v4f){ 0.0f, 0.0f, 0.0f, gui.factive*0.8f } );
  56       render_fsquad1();
  57    }
  58
  59    f64 loc_t = (vg.time - gui.location_time) / 5.0;
  60    if( (loc_t < 1.0) && (gui.location_time != 0.0) ){
  61       /* yep this code is a mess, i dont care anymore */
  62       glEnable(GL_BLEND);
  63       glDisable(GL_DEPTH_TEST);
  64       glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
  65       glBlendEquation(GL_FUNC_ADD);
  66
  67       f32 t = 1.0f-vg_minf(1.0f,vg_minf(loc_t*20.0f,2.0f-loc_t*2.0f)),
  68           o = 1.0f-t*t*(2.0f-t);
  69
  70       shader_blitcolour_use();
  71       shader_blitcolour_uColour( (v4f){ 0.0f, 0.0f, 0.0f, o*0.5f } );
  72       render_fsquad2();
  73
  74       f32 dy    = ft/0.79f,
  75          scale = dy*0x1p-4f*0.5f;
  76
  77       m4x3f mmdl;
  78       m3x3_identity( mmdl );
  79       m3x3_scale( mmdl, (v3f){scale,scale,scale} );
  80       v3_zero( mmdl[3] );
  81
  82       f32 pad = dy*0x1p-4f*0.125f;
  83       f32 w = font3d_string_width( &gui.font,2,gui.location );
  84
  85       mmdl[3][0] = fr*0.5f - w*scale*0.5f;
  86       mmdl[3][1] = 0.3f*ft+pad*2.0f;
  87
  88       font3d_bind( &gui.font, &ortho );
  89       shader_model_font_uColour( (v4f){1.2f,1.2f,1.2f,o} );
  90       font3d_simple_draw( &gui.font, 2, gui.location, &ortho, mmdl );
  91    }
  92
  93    font3d_bind( &gui.font, &ortho );
  94
  95    float dy    = ft/0.79f,
  96          scale = dy*0x1p-4f*0.75f;
  97
  98    m4x3f mmdl;
  99    m3x3_identity( mmdl );
 100    m3x3_scale( mmdl, (v3f){scale,scale,scale} );
 101    v3_zero( mmdl[3] );
 102
 103    float pad = dy*0x1p-4f*0.125f;
 104    mmdl[3][0] = pad*2.0f;
 105    mmdl[3][1] = pad;
 106
 107    for( u32 i=0; i<gui.helper_count; i++ ){
 108       struct gui_helper *helper = &gui.helpers[i];
 109
 110       shader_model_font_uColour( (v4f){1.0f,1.0f,1.0f,1.0f} );
 111
 112       struct font3d_render render;
 113       font3d_begin( &gui.font, 2, &ortho, mmdl, &render );
 114
 115       render.u8pch = (u8*)helper->bindstr;
 116       font3d_draw( &render );
 117
 118       const char *make_smaller = "\x02\xaf\x03 ";
 119       render.u8pch = (const u8*)make_smaller;
 120       font3d_draw( &render );
 121
 122       render.u8pch = (u8*)helper->text;
 123       font3d_draw( &render );
 124
 125       float w = render.offset[0]+1.0f;
 126       mmdl[3][0] += w*scale;
 127    }
 128
 129    gui.helper_count = 0;
 130 }
 131
 132 VG_STATIC
 133 void gui_helper_action( const char *bindstr, const char *text )
 134 {
 135    if( gui.helper_count >= vg_list_size(gui.helpers) )
 136       vg_fatal_error( "Too many helpers\n" );
 137
 138    struct gui_helper *helper = &gui.helpers[ gui.helper_count ++ ];
 139    helper->bindstr = bindstr;
 140    helper->text = text;
 141 }
 142
 143 VG_STATIC
 144 int gui_location_print_ccmd( int argc, const char *argv[] ){
 145    if( argc > 0 ){
 146       char new_loc[64];
 147       vg_str str;
 148       vg_strnull( &str, new_loc, 64 );
 149       for( int i=0; i<argc; i++ ){
 150          vg_strcat( &str, argv[i] );
 151          vg_strcat( &str, " " );
 152       }
 153       if( !strcmp(gui.location,new_loc) ) return 0;
 154       vg_strncpy( new_loc, gui.location, 64, k_strncpy_always_add_null );
 155       gui.location_time = vg.time;
 156    }
 157    return 0;
 158 }
 159
 160 VG_STATIC void gui_init(void)
 161 {
 162    font3d_load( &gui.font, "models/rs_font.mdl", vg_mem.rtmemory );
 163    vg_console_reg_cmd( "gui_location", gui_location_print_ccmd, NULL );
 164 }
 165
 166 #endif /* GUI_H */