UUSL数据结构

Data has the following fields (values in world space has _w postfix): Data具有以下字段（世界空间中的值具有_w后缀）：

struct Data {
	
	float 	depth;
	float3	position;
	float3	view;
	
	float3	normal;
	float3	reflection;
	
	// world space values
	float3	view_w;
	float3	normal_w;
	float3	reflection_w;
	
	float3	sky_reflect;
	
	float2	screen_coord;
	
	float	dotNV;
	
	float dielectric;
	float gloss;
};

Data dataDefault ( ) #

Default constructor for Data structure. It creates an instance with default (not null) values.

返回值

Data structure with default (not null) values.

void dataSetPosition ( inout Data Data, float3 pos ) #

Calculates position, depth and view values for given Data struct.

参数

• inout Data Data - Data structure to fill.要填充的Data结构。
• float3 pos - Position vector.位置向量。

void dataCalculateWorldSpace ( Data Data ) #

Calculates world view, normal, reflection in world space by using corresponding values of given Data struct.

参数

• Data Data - Data structure to fill.要填充的Data结构。

void dataSetGbuffer ( inout Data Data, GBuffer gbuffer ) #

Sets Data's structure normal, dielectric and gloss values by using corresponding values of given GBuffer instance.

参数

• inout Data Data - Data structure. Data结构。
• GBuffer gbuffer - GBuffer instance with necessary values to be set. GBuffer实例，需要设置必要的值。

void dataCalculateAll ( inout Data data, GBuffer gbuffer, float3 pos, float2 screen_coord ) #

Calculates all values for Data struct.

参数

• inout Data data - Data structure to be filled with calculated values. Data结构要填充计算所得的值。
• GBuffer gbuffer - GBuffer struct. GBuffer结构。
• float3 pos - Position vector.位置向量。
• float2 screen_coord - Screen coordinates.屏幕坐标。

To use Data structure in your shader's code, you should define and initialize the Data structure and fill it.要在着色器代码中使用Data结构，应定义并初始化Data结构并填充它。

The following example shows the way of creating Data structure and calculating its values.以下示例显示了创建数据结构和计算其值的方法。

/* ... */
// input structure for fragment shader
STRUCT(FRAGMENT_IN)
	INIT_POSITION
	INIT_IN(float4,0)
	INIT_IN(float3,1)
	INIT_IN(float3x3,2)
	
	#ifdef USE_ALPHA_FADE && ALPHA_FADE
		INIT_IN(float,9)
	#endif
END

/* ... */
// in the main function of fragment shader
	// GBuffer 
	GBuffer gbuffer;

	/* fill the GBuffer struct */

	Data data;
	dataCalculateAll(data,gbuffer,IN_DATA(1),IN_POSITION.xy);
/* ... */