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/frustum.h"
   6 #include "client/scene.h"
   7 #include "client/shader.h"
   8 #include "day.h"
   9 #include "util.h"
  10
  11 struct Scene scene;
  12
  13 bool scene_init()
  14 {
  15         scene.objects = list_create(NULL),
  16         pthread_mutex_init(&scene.mtx, NULL);
  17
  18         glGetIntegerv(GL_MAX_TEXTURE_UNITS, &scene.max_texture_units);
  19
  20         char max_texture_units_def[BUFSIZ];
  21         sprintf(max_texture_units_def, "#define MAX_TEXTURE_UNITS %d\n", scene.max_texture_units);
  22
  23         if (! shader_program_create(RESSOURCEPATH "shaders/3d", &scene.prog, max_texture_units_def)) {
  24                 fprintf(stderr, "Failed to create 3D shader program\n");
  25                 return false;
  26         }
  27
  28         scene.loc_model = glGetUniformLocation(scene.prog, "model");
  29         scene.loc_VP = glGetUniformLocation(scene.prog, "VP");
  30         scene.loc_daylight = glGetUniformLocation(scene.prog, "daylight");
  31         scene.loc_lightDir = glGetUniformLocation(scene.prog, "lightDir");
  32         scene.loc_cameraPos = glGetUniformLocation(scene.prog, "cameraPos");
  33
  34         GLint texture_indices[scene.max_texture_units];
  35         for (GLint i = 0; i < scene.max_texture_units; i++)
  36                 texture_indices[i] = i;
  37
  38         glProgramUniform1iv(scene.prog, glGetUniformLocation(scene.prog, "textures"), scene.max_texture_units, texture_indices);
  39
  40         scene.fov = 86.1f;
  41         scene.render_distance = 255.0f + 32.0f;
  42
  43         return true;
  44 }
  45
  46 static void list_delete_object(void *key, unused void *value, unused void *arg)
  47 {
  48         object_delete(key);
  49 }
  50
  51 void scene_deinit()
  52 {
  53         list_clear_func(&scene.objects, &list_delete_object, NULL);
  54         pthread_mutex_destroy(&scene.mtx);
  55         glDeleteProgram(scene.prog);
  56 }
  57
  58 void scene_add_object(Object *obj)
  59 {
  60         pthread_mutex_lock(&scene.mtx);
  61         list_put(&scene.objects, obj, NULL);
  62         pthread_mutex_unlock(&scene.mtx);
  63 }
  64
  65 void scene_render(f64 dtime)
  66 {
  67 #pragma GCC diagnostic push
  68 #pragma GCC diagnostic ignored "-Wpedantic"
  69         mat4x4_mul(scene.VP, scene.projection, camera.view);
  70
  71         vec4 base_sunlight_dir = {0.0f, 0.0f, -1.0f, 1.0f};
  72         vec4 sunlight_dir;
  73         mat4x4 sunlight_mat;
  74         mat4x4_identity(sunlight_mat);
  75         mat4x4_rotate(sunlight_mat, sunlight_mat, 1.0f, 0.0f, 0.0f, get_sun_angle() + M_PI / 2.0f);
  76         mat4x4_mul_vec4(sunlight_dir, sunlight_mat, base_sunlight_dir);
  77 #pragma GCC diagnostic pop
  78
  79         frustum_update(scene.VP);
  80
  81         glUseProgram(scene.prog);
  82         glUniformMatrix4fv(scene.loc_VP, 1, GL_FALSE, scene.VP[0]);
  83         glUniform3f(scene.loc_lightDir, sunlight_dir[0], sunlight_dir[1], sunlight_dir[2]);
  84         glUniform3f(scene.loc_cameraPos, camera.eye[0], camera.eye[1], camera.eye[2]);
  85         glUniform1f(scene.loc_daylight, get_daylight());
  86
  87         for (ListPair **pairptr = &scene.objects.first; *pairptr != NULL; ) {
  88                 ListPair *pair = *pairptr;
  89                 Object *obj = pair->key;
  90                 if (obj->remove) {
  91                         pthread_mutex_lock(&scene.mtx);
  92                         *pairptr = pair->next;
  93                         pthread_mutex_unlock(&scene.mtx);
  94                         free(pair);
  95                         object_delete(obj);
  96                 } else {
  97                         object_render(obj, dtime);
  98                         pairptr = &pair->next;
  99                 }
 100         }
 101 }
 102
 103 void scene_on_resize(int width, int height)
 104 {
 105         mat4x4_perspective(scene.projection, scene.fov / 180.0f * M_PI, (float) width / (float) height, 0.01f, scene.render_distance);
 106 }
 107
 108 GLuint scene_get_max_texture_units()
 109 {
 110         return scene.max_texture_units;
 111 }