骑砍战团MOD开发(34)-光照系统

一.Direct3D光照类型

? ? ?Direct3D将光源分为3种类型,点光源,方向光源,聚光灯源.Direct3D内部会根据光源类型进行2D渲染管线实时计算.

? ? ?Direct3D将光照参数封装在D3DLight9结构体中,重要参数有光源类型,漫反射参数,高光参数等.

typedef struct D3DLIGHT9 {
    D3DLIGHTTYPE Type;
    D3DCOLORVALUE Diffuse;
    D3DCOLORVALUE Specular;
    D3DCOLORVALUE Ambient;
    D3DVECTOR Position;
    D3DVECTOR Direction;
} D3DLIGHT9, *LPD3DLIGHT;

Diffuse－光源发出的漫反射光颜色。
Specular－光源发出的镜面光颜色。
Ambient－光源发出的环境光颜色。
Position－用向量表示的光源世界坐标位置（对方向光无效）。

二.骑砍引擎光照类型

? ? ?骑砍通过将Direct3D中光照类型进行封装后,将灯光分为点光源和日光源.室内场景通过添加场景物spr_light实现点光源,室外场景通过设置日光源参数实现白天和黑夜的光照效果.

? ? 室内场景(sf_indoor)灯光场景物:

  #室内场景点光源,可以理解为电灯泡
  ("light_sun",sokf_invisible,"light_sphere","0",  []),
  ("light",sokf_invisible,"light_sphere","0",  []),
  ("light_red",sokf_invisible,"light_sphere","0",  []),
  ("light_night",sokf_invisible,"light_sphere","0",  []),


  #设置点光源光照强度,颜色API
  set_current_color  = 1950  # (set_current_color, <red_value>, <green_value>, <blue_value>),

  set_position_delta = 1955  # (set_position_delta, <value>, <value>, <value>),

  add_point_light = 1960  # (add_point_light, [flicker_magnitude], [flicker_interval]),

  add_point_light_to_entity = 1961  # (add_point_light_to_entity, [flicker_magnitude], [flicker_interval]),

? ? ?室外场景(野外战斗)灯光控制:

set_skybox  = 2389  # (set_skybox, <non_hdr_skybox_index>, <hdr_skybox_index>),

#太阳光强度
set_startup_sun_light = 2390  # (set_startup_sun_light, <r>, <g>, <b>),

#漫反射强度
set_startup_ambient_light                    = 2391  # (set_startup_ambient_light, <r>, <g>, <b>),

#地面漫反射强度
set_startup_ground_ambient_light             = 2392  # (set_startup_ground_ambient_light, <r>, <g>, <b>),