src/client/interact.c

   1 #include <linmath.h>
   2 #include <stdio.h>
   3 #include "client/camera.h"
   4 #include "client/client.h"
   5 #include "client/client_item.h"
   6 #include "client/client_node.h"
   7 #include "client/client_player.h"
   8 #include "client/cube.h"
   9 #include "client/debug_menu.h"
  10 #include "client/frustum.h"
  11 #include "client/gl_debug.h"
  12 #include "client/gui.h"
  13 #include "client/interact.h"
  14 #include "client/mesh.h"
  15 #include "client/raycast.h"
  16 #include "client/shader.h"
  17
  18 struct InteractPointed interact_pointed;
  19
  20 static GLuint shader_prog;
  21 static GLint loc_MVP;
  22 static GLint loc_color;
  23 static mat4x4 model;
  24
  25 typedef struct {
  26         v3f32 position;
  27 } __attribute__((packed)) SelectionVertex;
  28 static Mesh selection_mesh = {
  29         .layout = &(VertexLayout) {
  30                 .attributes = (VertexAttribute[]) {
  31                         {GL_FLOAT, 3, sizeof(v3f32)},
  32                 },
  33                 .count = 1,
  34                 .size = sizeof(SelectionVertex),
  35         },
  36         .vao = 0,
  37         .vbo = 0,
  38         .data = NULL,
  39         .count = 36,
  40         .free_data = false,
  41 };
  42
  43 void interact_init()
  44 {
  45         shader_prog = shader_program_create(ASSET_PATH "shaders/3d/selection", NULL);
  46         loc_MVP = glGetUniformLocation(shader_prog, "MVP"); GL_DEBUG
  47         loc_color = glGetUniformLocation(shader_prog, "color"); GL_DEBUG
  48
  49         SelectionVertex vertices[6][6];
  50         for (int f = 0; f < 6; f++)
  51                 for (int v = 0; v < 6; v++)
  52                         vertices[f][v].position = v3f32_scale(cube_vertices[f][v].position, 1.1f);
  53
  54         selection_mesh.data = vertices;
  55         mesh_upload(&selection_mesh);
  56
  57         gui_add(NULL, (GUIElementDef) {
  58                 .pos = {0.5f, 0.5f},
  59                 .z_index = 0.0f,
  60                 .offset = {0, 0},
  61                 .margin = {0, 0},
  62                 .align = {0.5f, 0.5f},
  63                 .scale = {1.0f, 1.0f},
  64                 .scale_type = SCALE_IMAGE,
  65                 .affect_parent_scale = false,
  66                 .text = NULL,
  67                 .image = texture_load(ASSET_PATH "textures/crosshair.png", false),
  68                 .text_color = {0.0f, 0.0f, 0.0f, 0.0f},
  69                 .bg_color = {0.0f, 0.0f, 0.0f, 0.0f},
  70         });
  71 }
  72
  73 void interact_deinit()
  74 {
  75         glDeleteProgram(shader_prog); GL_DEBUG
  76         mesh_destroy(&selection_mesh);
  77 }
  78
  79 #include "client/client_terrain.h"
  80
  81 void interact_tick()
  82 {
  83         bool old_exists = interact_pointed.exists;
  84         v3s32 old_pointed = interact_pointed.pos;
  85         if ((interact_pointed.exists = raycast(
  86                                 (v3f64) {camera.eye  [0], camera.eye  [1], camera.eye  [2]},
  87                                 (v3f64) {camera.front[0], camera.front[1], camera.front[2]},
  88                                 5, &interact_pointed.pos, &interact_pointed.node))
  89                         && !v3s32_equals(interact_pointed.pos, old_pointed)) {
  90                 mat4x4_translate(model,
  91                         interact_pointed.pos.x, interact_pointed.pos.y, interact_pointed.pos.z);
  92                 v3f32 *color = &client_node_def[interact_pointed.node].selection_color;
  93                 glProgramUniform3f(shader_prog, loc_color, color->x, color->y, color->z); GL_DEBUG
  94                 debug_menu_changed(ENTRY_POINTED);
  95         }
  96
  97         if (old_exists && !interact_pointed.exists)
  98                 debug_menu_changed(ENTRY_POINTED);
  99 }
 100
 101 void interact_render()
 102 {
 103         if (!interact_pointed.exists)
 104                 return;
 105
 106         mat4x4 mvp;
 107         mat4x4_mul(mvp, frustum, model);
 108
 109         glUseProgram(shader_prog); GL_DEBUG
 110         glUniformMatrix4fv(loc_MVP, 1, GL_FALSE, mvp[0]); GL_DEBUG
 111         mesh_render(&selection_mesh);
 112 }
 113
 114 void interact_use(bool left)
 115 {
 116         ClientEntity *entity = client_player_entity_local();
 117         if (!entity)
 118                 return;
 119
 120         ClientPlayerData *data = entity->extra;
 121         pthread_mutex_lock(&data->mtx_inv);
 122
 123         ItemStack *stack = left ? &data->inventory.left : &data->inventory.right;
 124         if (client_item_def[stack->type].use && client_item_def[stack->type].use(stack))
 125                 dragonnet_peer_send_ToServerInteract(client, &(ToServerInteract) {
 126                         .left = left,
 127                         .pointed = interact_pointed.exists,
 128                         .pos = interact_pointed.pos,
 129                 });
 130
 131         pthread_mutex_unlock(&data->mtx_inv);
 132         refcount_drp(&entity->rc);
 133 }