src/client/light.c

   1 #include <linmath.h>
   2 #include "client/camera.h"
   3 #include "client/opengl.h"
   4 #include "client/light.h"
   5 #include "common/day.h"
   6
   7 void light_shader_locate(LightShader *shader)
   8 {
   9         shader->loc_daylight = glGetUniformLocation(shader->prog, "daylight"); GL_DEBUG
  10         shader->loc_fogColor = glGetUniformLocation(shader->prog, "fogColor"); GL_DEBUG
  11         shader->loc_ambientLight = glGetUniformLocation(shader->prog, "ambientLight"); GL_DEBUG
  12         shader->loc_lightDir = glGetUniformLocation(shader->prog, "lightDir"); GL_DEBUG
  13         shader->loc_cameraPos = glGetUniformLocation(shader->prog, "cameraPos"); GL_DEBUG
  14 }
  15
  16 void light_shader_update(LightShader *shader)
  17 {
  18         vec4 base_sunlight_dir = {0.0f, 0.0f, -1.0f, 1.0f};
  19         vec4 sunlight_dir;
  20         mat4x4 sunlight_mat;
  21         mat4x4_identity(sunlight_mat);
  22
  23         mat4x4_rotate(sunlight_mat, sunlight_mat, 1.0f, 0.0f, 0.0f, get_sun_angle() + M_PI / 2.0f);
  24         mat4x4_mul_vec4(sunlight_dir, sunlight_mat, base_sunlight_dir);
  25
  26         f32 daylight = get_daylight();
  27         f32 ambient_light = f32_mix(0.3f, 0.7f, daylight);
  28         v3f32 fog_color = v3f32_mix((v3f32) {0x03, 0x0A, 0x1A}, (v3f32) {0x87, 0xCE, 0xEB}, daylight);
  29
  30         glProgramUniform1f(shader->prog, shader->loc_daylight, daylight); GL_DEBUG
  31         glProgramUniform3f(shader->prog, shader->loc_fogColor, fog_color.x / 0xFF * ambient_light, fog_color.y / 0xFF * ambient_light, fog_color.z / 0xFF * ambient_light); GL_DEBUG
  32         glProgramUniform1f(shader->prog, shader->loc_ambientLight, ambient_light); GL_DEBUG
  33         glProgramUniform3f(shader->prog, shader->loc_lightDir, sunlight_dir[0], sunlight_dir[1], sunlight_dir[2]); GL_DEBUG
  34         glProgramUniform3f(shader->prog, shader->loc_cameraPos, camera.eye[0], camera.eye[1], camera.eye[2]); GL_DEBUG
  35 }