world_water.c

   1 /*
   2  * Copyright (C) 2021-2023 Mt.ZERO Software, Harry Godden - All Rights Reserved
   3  */
   4
   5 #include "world_water.h"
   6 #include "world_render.h"
   7 #include "render.h"
   8 #include "shaders/scene_water.h"
   9 #include "shaders/scene_water_fast.h"
  10 #include "scene.h"
  11 #include "player.h"
  12 #include "player_walk.h"
  13 #include "player_dead.h"
  14
  15 struct world_water world_water;
  16
  17 void world_water_init(void)
  18 {
  19    vg_info( "world_water_init\n" );
  20
  21    vg_tex2d_load_qoi_async_file( "textures/water_surf.qoi",
  22                                  VG_TEX2D_LINEAR|VG_TEX2D_REPEAT,
  23                                  &world_water.tex_water_surf );
  24
  25    vg_success( "done\n" );
  26 }
  27
  28 void water_set_surface( world_instance *world, float height )
  29 {
  30    world->water.height = height;
  31    v4_copy( (v4f){ 0.0f, 1.0f, 0.0f, height }, world->water.plane );
  32 }
  33
  34 void world_link_lighting_ub( world_instance *world, GLuint shader );
  35 void world_bind_position_texture( world_instance *world,
  36                                      GLuint shader, GLuint location,
  37                                      int slot );
  38 void world_bind_light_array( world_instance *world,
  39                                 GLuint shader, GLuint location,
  40                                 int slot );
  41 void world_bind_light_index( world_instance *world,
  42                                        GLuint shader, GLuint location,
  43                                        int slot );
  44
  45 /*
  46  * Does not write motion vectors
  47  */
  48 void render_water_texture( world_instance *world, vg_camera *cam )
  49 {
  50    if( !world->water.enabled || (vg.quality_profile == k_quality_profile_low) )
  51       return;
  52
  53    /* Draw reflection buffa */
  54    vg_framebuffer_bind( g_render.fb_water_reflection, k_render_scale );
  55    glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
  56
  57    /*
  58     * Create flipped view matrix. Don't care about motion vectors
  59     */
  60    float cam_height = cam->transform[3][1] - world->water.height;
  61
  62    vg_camera water_cam;
  63    water_cam.farz = cam->farz;
  64    water_cam.nearz = cam->nearz;
  65    v3_copy( cam->transform[3], water_cam.transform[3] );
  66    water_cam.transform[3][1] -= 2.0f * cam_height;
  67
  68    m3x3f flip;
  69    m3x3_identity( flip );
  70    flip[1][1] = -1.0f;
  71    m3x3_mul( flip, cam->transform, water_cam.transform );
  72
  73    vg_camera_update_view( &water_cam );
  74
  75    /*
  76     * Create clipped projection
  77     */
  78    v4f clippa = { 0.0f, 1.0f, 0.0f, world->water.height-0.1f };
  79    m4x3_mulp( water_cam.transform_inverse, clippa, clippa );
  80    clippa[3] *= -1.0f;
  81
  82    m4x4_copy( cam->mtx.p, water_cam.mtx.p );
  83    m4x4_clip_projection( water_cam.mtx.p, clippa );
  84
  85    vg_camera_finalize( &water_cam );
  86
  87    /*
  88     * Draw world
  89     */
  90    glEnable( GL_DEPTH_TEST );
  91    glDisable( GL_BLEND );
  92    glCullFace( GL_FRONT );
  93    render_world( world, &water_cam, 0, 1, 0, 1 );
  94    glCullFace( GL_BACK );
  95
  96    /*
  97     * Create beneath view matrix
  98     */
  99    vg_camera beneath_cam;
 100    vg_framebuffer_bind( g_render.fb_water_beneath, k_render_scale );
 101    glClearColor( 1.0f, 0.0f, 0.0f, 0.0f );
 102    glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
 103
 104    m4x3_copy( cam->transform, beneath_cam.transform );
 105    vg_camera_update_view( &beneath_cam );
 106
 107    float bias = -(cam->transform[3][1]-world->water.height)*0.1f;
 108
 109    v4f clippb = { 0.0f, -1.0f, 0.0f, -(world->water.height) + bias };
 110    m4x3_mulp( beneath_cam.transform_inverse, clippb, clippb );
 111    clippb[3] *= -1.0f;
 112
 113    m4x4_copy( cam->mtx.p, beneath_cam.mtx.p );
 114    m4x4_clip_projection( beneath_cam.mtx.p, clippb );
 115    vg_camera_finalize( &beneath_cam );
 116
 117    glEnable( GL_DEPTH_TEST );
 118    glDisable( GL_BLEND );
 119    render_world_depth( world, &beneath_cam );
 120    //glViewport( 0,0, g_render_x, g_render_y );
 121 }
 122
 123 void render_water_surface( world_instance *world, vg_camera *cam )
 124 {
 125    if( !world->water.enabled )
 126       return;
 127
 128    if( vg.quality_profile == k_quality_profile_high )
 129    {
 130       /* Draw surface */
 131       shader_scene_water_use();
 132
 133       vg_framebuffer_bind_texture( g_render.fb_water_reflection, 0, 0 );
 134       shader_scene_water_uTexMain( 0 );
 135
 136       glActiveTexture( GL_TEXTURE1 );
 137       glBindTexture( GL_TEXTURE_2D, world_water.tex_water_surf );
 138       shader_scene_water_uTexDudv( 1 );
 139
 140       shader_scene_water_uInvRes( (v2f){
 141             1.0f / (float)vg.window_x,
 142             1.0f / (float)vg.window_y });
 143
 144       WORLD_BIND_LIGHT_BUFFERS_UB0_TEX234( world, scene_water );
 145
 146       vg_framebuffer_bind_texture( g_render.fb_water_beneath, 0, 5 );
 147       shader_scene_water_uTexBack( 5 );
 148       shader_scene_water_uTime( world_static.time );
 149       shader_scene_water_uCamera( cam->transform[3] );
 150       shader_scene_water_uSurfaceY( world->water.height );
 151
 152       shader_scene_water_uPv( cam->mtx.pv );
 153       shader_scene_water_uPvmPrev( cam->mtx_prev.pv );
 154
 155       m4x3f full;
 156       m4x3_identity( full );
 157       shader_scene_water_uMdl( full );
 158
 159       glEnable(GL_BLEND);
 160       glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 161       glBlendEquation(GL_FUNC_ADD);
 162
 163       mesh_bind( &world->mesh_no_collide );
 164
 165       for( int i=0; i<world->surface_count; i++ )
 166       {
 167          struct world_surface *mat = &world->surfaces[i];
 168          struct shader_props_water *props = mat->info.props.compiled;
 169
 170          if( mat->info.shader == k_shader_water )
 171          {
 172             shader_scene_water_uShoreColour( props->shore_colour );
 173             shader_scene_water_uOceanColour( props->deep_colour );
 174             shader_scene_water_uFresnel( props->fresnel );
 175             shader_scene_water_uWaterScale( props->water_sale );
 176             shader_scene_water_uWaveSpeed( props->wave_speed );
 177
 178             mdl_draw_submesh( &mat->sm_no_collide );
 179          }
 180       }
 181
 182       glDisable(GL_BLEND);
 183    }
 184    else if( (vg.quality_profile == k_quality_profile_low) ||
 185             (vg.quality_profile == k_quality_profile_min) )
 186    {
 187       shader_scene_water_fast_use();
 188
 189       glActiveTexture( GL_TEXTURE1 );
 190       glBindTexture( GL_TEXTURE_2D, world_water.tex_water_surf );
 191       shader_scene_water_fast_uTexDudv( 1 );
 192
 193       shader_scene_water_fast_uTime( world_static.time );
 194       shader_scene_water_fast_uCamera( cam->transform[3] );
 195       shader_scene_water_fast_uSurfaceY( world->water.height );
 196
 197       WORLD_BIND_LIGHT_BUFFERS_UB0_TEX234( world, scene_water_fast );
 198
 199       m4x3f full;
 200       m4x3_identity( full );
 201       shader_scene_water_fast_uMdl( full );
 202       shader_scene_water_fast_uPv( cam->mtx.pv );
 203       shader_scene_water_fast_uPvmPrev( cam->mtx_prev.pv );
 204
 205       glEnable(GL_BLEND);
 206       glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 207       glBlendEquation(GL_FUNC_ADD);
 208
 209       mesh_bind( &world->mesh_no_collide );
 210
 211       for( int i=0; i<world->surface_count; i++ )
 212       {
 213          struct world_surface *mat = &world->surfaces[i];
 214          struct shader_props_water *props = mat->info.props.compiled;
 215
 216          if( mat->info.shader == k_shader_water )
 217          {
 218             shader_scene_water_fast_uShoreColour( props->shore_colour );
 219             shader_scene_water_fast_uOceanColour( props->deep_colour );
 220
 221             mdl_draw_submesh( &mat->sm_no_collide );
 222          }
 223       }
 224
 225       glDisable(GL_BLEND);
 226    }
 227 }
 228
 229 static void world_water_drown(void)
 230 {
 231    if( localplayer.drowned ) return;
 232    player__networked_sfx( k_player_subsystem_walk, 32,
 233                           k_player_walk_soundeffect_splash,
 234                           localplayer.rb.co, 1.0f );
 235    vg_info( "player fell of due to walking into walker\n" );
 236    localplayer.drowned = 1;
 237    player__dead_transition( k_player_die_type_generic );
 238 }
 239
 240 bool world_water_player_safe( world_instance *world, f32 allowance )
 241 {
 242    if( !world->water.enabled ) return 1;
 243    if( world->info.flags & 0x2 ) return 1;
 244
 245    if( localplayer.rb.co[1]+allowance < world->water.height )
 246    {
 247       world_water_drown();
 248       return 0;
 249    }
 250
 251    return 1;
 252 }
 253
 254 entity_call_result ent_water_call( world_instance *world, ent_call *call )
 255 {
 256    if( call->function == 0 )
 257    {
 258       world_water_drown();
 259       return k_entity_call_result_OK;
 260    }
 261
 262    return k_entity_call_result_unhandled;
 263 }