glsl函数之向量函数
lessThan
Perform a component-wise less-than comparison of two vectors
bvec2 lessThan(vec2 x, vec2 y)
bvec3 lessThan(vec3 x, vec3 y)
bvec4 lessThan(vec4 x, vec4 y)
bvec2 lessThan(ivec2 x, ivec2 y)
bvec3 lessThan(ivec3 x, ivec3 y)
bvec4 lessThan(ivec4 x, ivec4 y)
lessThanEqual
Perform a component-wise less-than-or-equal comparison of two vectors
bvec2 lessThanEqual(vec2 x, vec2 y)
bvec3 lessThanEqual(vec3 x, vec3 y)
bvec4 lessThanEqual(vec4 x, vec4 y)
bvec2 lessThanEqual(ivec2 x, ivec2 y)
bvec3 lessThanEqual(ivec3 x, ivec3 y)
bvec4 lessThanEqual(ivec4 x, ivec4 y)
greaterThan
Perform a component-wise greater-than comparison of two vectors

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