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/client_config.h"
   6 #include "client/frustum.h"
   7 #include "client/scene.h"
   8 #include "client/shader.h"
   9 #include "day.h"
  10 #include "util.h"
  11
  12 struct Scene scene;
  13
  14 static int bintree_compare_f32(void *v1, void *v2, unused Bintree *tree)
  15 {
  16         f32 diff = (*(f32 *) v2) - (*(f32 *) v1);
  17         return CMPBOUNDS(diff);
  18 }
  19
  20 bool scene_init()
  21 {
  22         scene.objects = list_create(NULL);
  23         scene.transparent_objects = bintree_create(sizeof(f32), &bintree_compare_f32);
  24         pthread_mutex_init(&scene.mtx, NULL);
  25
  26         glGetIntegerv(GL_MAX_TEXTURE_UNITS, &scene.max_texture_units);
  27
  28         char *shader_defs = format_string(
  29                 "#define MAX_TEXTURE_UNITS %d\n"
  30                 "#define RENDER_DISTANCE %lf\n",
  31                 scene.max_texture_units,
  32                 client_config.render_distance
  33         );
  34
  35         if (! shader_program_create(RESSOURCE_PATH "shaders/3d", &scene.prog, shader_defs)) {
  36                 fprintf(stderr, "Failed to create 3D shader program\n");
  37                 return false;
  38         }
  39
  40         free(shader_defs);
  41
  42         scene.loc_model = glGetUniformLocation(scene.prog, "model");
  43         scene.loc_VP = glGetUniformLocation(scene.prog, "VP");
  44         scene.loc_daylight = glGetUniformLocation(scene.prog, "daylight");
  45         scene.loc_fogColor = glGetUniformLocation(scene.prog, "fogColor");
  46         scene.loc_ambientLight = glGetUniformLocation(scene.prog, "ambientLight");
  47         scene.loc_lightDir = glGetUniformLocation(scene.prog, "lightDir");
  48         scene.loc_cameraPos = glGetUniformLocation(scene.prog, "cameraPos");
  49
  50         GLint texture_indices[scene.max_texture_units];
  51         for (GLint i = 0; i < scene.max_texture_units; i++)
  52                 texture_indices[i] = i;
  53
  54         glProgramUniform1iv(scene.prog, glGetUniformLocation(scene.prog, "textures"), scene.max_texture_units, texture_indices);
  55
  56         scene.fov = 86.1f;
  57
  58         return true;
  59 }
  60
  61 static void list_delete_object(void *key, unused void *value, unused void *arg)
  62 {
  63         object_delete(key);
  64 }
  65
  66 void scene_deinit()
  67 {
  68         list_clear_func(&scene.objects, &list_delete_object, NULL);
  69         pthread_mutex_destroy(&scene.mtx);
  70         glDeleteProgram(scene.prog);
  71 }
  72
  73 void scene_add_object(Object *obj)
  74 {
  75         pthread_mutex_lock(&scene.mtx);
  76         list_put(&scene.objects, obj, NULL);
  77         pthread_mutex_unlock(&scene.mtx);
  78 }
  79
  80 static void bintree_render_object(BintreeNode *node, unused void *arg)
  81 {
  82         object_render(node->value);
  83 }
  84
  85 void scene_render(f64 dtime)
  86 {
  87         mat4x4_mul(scene.VP, scene.projection, camera.view);
  88
  89         vec4 base_sunlight_dir = {0.0f, 0.0f, -1.0f, 1.0f};
  90         vec4 sunlight_dir;
  91         mat4x4 sunlight_mat;
  92         mat4x4_identity(sunlight_mat);
  93
  94         mat4x4_rotate(sunlight_mat, sunlight_mat, 1.0f, 0.0f, 0.0f, get_sun_angle() + M_PI / 2.0f);
  95         mat4x4_mul_vec4(sunlight_dir, sunlight_mat, base_sunlight_dir);
  96
  97         frustum_update(scene.VP);
  98
  99         f32 daylight = get_daylight();
 100         f32 ambient_light = f32_mix(0.3f, 0.7f, daylight);
 101         v3f32 fog_color = v3f32_mix((v3f32) {0x03, 0x0A, 0x1A}, (v3f32) {0x87, 0xCE, 0xEB}, daylight);
 102
 103         glUseProgram(scene.prog);
 104         glUniformMatrix4fv(scene.loc_VP, 1, GL_FALSE, scene.VP[0]);
 105         glUniform3f(scene.loc_lightDir, sunlight_dir[0], sunlight_dir[1], sunlight_dir[2]);
 106         glUniform3f(scene.loc_cameraPos, camera.eye[0], camera.eye[1], camera.eye[2]);
 107         glUniform1f(scene.loc_daylight, daylight);
 108         glUniform3f(scene.loc_fogColor, fog_color.x / 0xFF * ambient_light, fog_color.y / 0xFF * ambient_light, fog_color.z / 0xFF * ambient_light);
 109         glUniform1f(scene.loc_ambientLight, ambient_light);
 110
 111         for (ListPair **pairptr = &scene.objects.first; *pairptr != NULL; ) {
 112                 ListPair *pair = *pairptr;
 113                 Object *obj = pair->key;
 114                 if (obj->remove) {
 115                         pthread_mutex_lock(&scene.mtx);
 116                         *pairptr = pair->next;
 117                         pthread_mutex_unlock(&scene.mtx);
 118                         free(pair);
 119                         object_delete(obj);
 120                 } else {
 121                         f32 distance = sqrt(pow(obj->pos.x - camera.eye[0], 2) + pow(obj->pos.y - camera.eye[1], 2) + pow(obj->pos.z - camera.eye[2], 2));
 122                         if (distance < client_config.render_distance && object_before_render(obj, dtime)) {
 123                                 if (obj->transparent)
 124                                         bintree_insert(&scene.transparent_objects, &distance, obj);
 125                                 else
 126                                         object_render(obj);
 127                         }
 128                         pairptr = &pair->next;
 129                 }
 130         }
 131
 132         bintree_traverse(&scene.transparent_objects, BTT_INORDER, &bintree_render_object, NULL);
 133         bintree_clear(&scene.transparent_objects, NULL, NULL);
 134 }
 135
 136 void scene_on_resize(int width, int height)
 137 {
 138         mat4x4_perspective(scene.projection, scene.fov / 180.0f * M_PI, (float) width / (float) height, 0.01f, client_config.render_distance + 28.0f);
 139 }
 140
 141 GLuint scene_get_max_texture_units()
 142 {
 143         return scene.max_texture_units;
 144 }