src/client/scene.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include "client/camera.h"
   4 #include "client/client.h"
   5 #include "client/scene.h"
   6 #include "client/shader.h"
   7 #include "day.h"
   8 #include "util.h"
   9
  10 struct Scene scene;
  11
  12 bool scene_init()
  13 {
  14         scene.objects = list_create(NULL),
  15         pthread_mutex_init(&scene.mtx, NULL);
  16
  17         glGetIntegerv(GL_MAX_TEXTURE_UNITS, &scene.max_texture_units);
  18
  19         char max_texture_units_def[BUFSIZ];
  20         sprintf(max_texture_units_def, "#define MAX_TEXTURE_UNITS %d\n", scene.max_texture_units);
  21
  22         if (! shader_program_create(RESSOURCEPATH "shaders/3d", &scene.prog, max_texture_units_def)) {
  23                 fprintf(stderr, "Failed to create 3D shader program\n");
  24                 return false;
  25         }
  26
  27         scene.loc_MVP = glGetUniformLocation(scene.prog, "MVP");
  28         scene.loc_daylight = glGetUniformLocation(scene.prog, "daylight");
  29         scene.loc_lightDir = glGetUniformLocation(scene.prog, "lightDir");
  30
  31         GLint texture_indices[scene.max_texture_units];
  32         for (GLint i = 0; i < scene.max_texture_units; i++)
  33                 texture_indices[i] = i;
  34
  35         glProgramUniform1iv(scene.prog, glGetUniformLocation(scene.prog, "textures"), scene.max_texture_units, texture_indices);
  36
  37         scene.fov = 86.1f;
  38         scene.render_distance = 255.0f;
  39
  40         return true;
  41 }
  42
  43 static void list_delete_object(void *key, unused void *value, unused void *arg)
  44 {
  45         object_delete(key);
  46 }
  47
  48 void scene_deinit()
  49 {
  50         list_clear_func(&scene.objects, &list_delete_object, NULL);
  51         pthread_mutex_destroy(&scene.mtx);
  52         glDeleteProgram(scene.prog);
  53 }
  54
  55 void scene_add_object(Object *obj)
  56 {
  57         pthread_mutex_lock(&scene.mtx);
  58         list_put(&scene.objects, obj, NULL);
  59         pthread_mutex_unlock(&scene.mtx);
  60 }
  61
  62 void scene_render()
  63 {
  64 #pragma GCC diagnostic push
  65 #pragma GCC diagnostic ignored "-Wpedantic"
  66         mat4x4 view_proj;
  67         mat4x4_mul(view_proj, scene.projection, camera.view);
  68
  69         vec4 base_sunlight_dir = {0.0f, 0.0f, -1.0f, 1.0f};
  70         vec4 sunlight_dir;
  71         mat4x4 sunlight_mat;
  72         mat4x4_identity(sunlight_mat);
  73         mat4x4_rotate(sunlight_mat, sunlight_mat, 1.0f, 0.0f, 0.0f, get_sun_angle() + M_PI / 2.0f);
  74         mat4x4_mul_vec4(sunlight_dir, sunlight_mat, base_sunlight_dir);
  75 #pragma GCC diagnostic pop
  76
  77         glUseProgram(scene.prog);
  78         glProgramUniform3f(scene.prog, scene.loc_lightDir, sunlight_dir[0], sunlight_dir[1], sunlight_dir[2]);
  79         glProgramUniform1f(scene.prog, scene.loc_daylight, get_daylight());
  80
  81         for (ListPair **pairptr = &scene.objects.first; *pairptr != NULL; ) {
  82                 ListPair *pair = *pairptr;
  83                 Object *obj = pair->key;
  84                 if (obj->remove) {
  85                         pthread_mutex_lock(&scene.mtx);
  86                         *pairptr = pair->next;
  87                         pthread_mutex_unlock(&scene.mtx);
  88                         free(pair);
  89                         object_delete(obj);
  90                 } else {
  91                         object_render(obj, view_proj, scene.loc_MVP);
  92                         pairptr = &pair->next;
  93                 }
  94         }
  95 }
  96
  97 void scene_on_resize(int width, int height)
  98 {
  99         mat4x4_perspective(scene.projection, scene.fov / 180.0f * M_PI, (float) width / (float) height, 0.01f, scene.render_distance);
 100 }
 101
 102 GLuint scene_get_max_texture_units()
 103 {
 104         return scene.max_texture_units;
 105 }