src/client/interact.c

   1 #include <linmath.h/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 bool interact_init()
  44 {
  45         if (!shader_program_create(RESSOURCE_PATH "shaders/3d/selection", &shader_prog, NULL)) {
  46                 fprintf(stderr, "[error] failed to create selection shader program\n");
  47                 return false;
  48         }
  49
  50         loc_MVP = glGetUniformLocation(shader_prog, "MVP"); GL_DEBUG
  51         loc_color = glGetUniformLocation(shader_prog, "color"); GL_DEBUG
  52
  53         SelectionVertex vertices[6][6];
  54         for (int f = 0; f < 6; f++)
  55                 for (int v = 0; v < 6; v++)
  56                         vertices[f][v].position = v3f32_scale(cube_vertices[f][v].position, 1.1f);
  57
  58         selection_mesh.data = vertices;
  59         mesh_upload(&selection_mesh);
  60
  61         gui_add(NULL, (GUIElementDef) {
  62                 .pos = {0.5f, 0.5f},
  63                 .z_index = 0.0f,
  64                 .offset = {0, 0},
  65                 .margin = {0, 0},
  66                 .align = {0.5f, 0.5f},
  67                 .scale = {1.0f, 1.0f},
  68                 .scale_type = SCALE_IMAGE,
  69                 .affect_parent_scale = false,
  70                 .text = NULL,
  71                 .image = texture_load(RESSOURCE_PATH "textures/crosshair.png", false),
  72                 .text_color = {0.0f, 0.0f, 0.0f, 0.0f},
  73                 .bg_color = {0.0f, 0.0f, 0.0f, 0.0f},
  74         });
  75
  76         return true;
  77 }
  78
  79 void interact_deinit()
  80 {
  81         glDeleteProgram(shader_prog); GL_DEBUG
  82         mesh_destroy(&selection_mesh);
  83 }
  84
  85 void interact_tick()
  86 {
  87         bool old_exists = interact_pointed.exists;
  88         v3s32 old_pointed = interact_pointed.pos;
  89         if ((interact_pointed.exists = raycast(
  90                                 (v3f64) {camera.eye  [0], camera.eye  [1], camera.eye  [2]},
  91                                 (v3f64) {camera.front[0], camera.front[1], camera.front[2]},
  92                                 5, &interact_pointed.pos, &interact_pointed.node))
  93                         && !v3s32_equals(interact_pointed.pos, old_pointed)) {
  94                 mat4x4_translate(model,
  95                         interact_pointed.pos.x, interact_pointed.pos.y, interact_pointed.pos.z);
  96                 v3f32 *color = &client_node_defs[interact_pointed.node].selection_color;
  97                 glProgramUniform3f(shader_prog, loc_color, color->x, color->y, color->z); GL_DEBUG
  98                 debug_menu_changed(ENTRY_POINTED);
  99         }
 100
 101         if (old_exists && !interact_pointed.exists)
 102                 debug_menu_changed(ENTRY_POINTED);
 103 }
 104
 105 void interact_render()
 106 {
 107         if (!interact_pointed.exists)
 108                 return;
 109
 110         mat4x4 mvp;
 111         mat4x4_mul(mvp, frustum, model);
 112
 113         glUseProgram(shader_prog); GL_DEBUG
 114         glUniformMatrix4fv(loc_MVP, 1, GL_FALSE, mvp[0]); GL_DEBUG
 115         mesh_render(&selection_mesh);
 116 }
 117
 118 void interact_use(bool left)
 119 {
 120         ClientEntity *entity = client_player_entity_local();
 121         if (!entity)
 122                 return;
 123
 124         ClientPlayerData *data = entity->extra;
 125         pthread_mutex_lock(&data->mtx_inv);
 126
 127         ItemStack *stack = left ? &data->inventory.left : &data->inventory.right;
 128         if (client_item_defs[stack->type].use && client_item_defs[stack->type].use(stack))
 129                 dragonnet_peer_send_ToServerInteract(client, &(ToServerInteract) {
 130                         .left = left,
 131                         .pointed = interact_pointed.exists,
 132                         .pos = interact_pointed.pos,
 133                 });
 134
 135         pthread_mutex_unlock(&data->mtx_inv);
 136         refcount_drp(&entity->rc);
 137 }