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https://github.com/patriciogonzalezvivo/thebookofshaders
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32 lines
991 B
Markdown
32 lines
991 B
Markdown
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## Step
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Generate a step function by comparing two values
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### Các phiên bản
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```glsl
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float step(float edge, float x)
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vec2 step(vec2 edge, vec2 x)
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vec3 step(vec3 edge, vec3 x)
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vec4 step(vec4 edge, vec4 x)
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vec2 step(float edge, vec2 x)
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vec3 step(float edge, vec3 x)
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vec4 step(float edge, vec4 x)
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```
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### Các tham số
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```edge``` specifies the location of the edge of the step function.
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```x``` specify the value to be used to generate the step function.
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### Mô tả
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```step()``` generates a step function by comparing ```x``` to ```edge```.
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For element ```i``` of the return value, ```0.0``` is returned ```if x[i] < edge[i]```, and ```1.0``` is returned otherwise.
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<div class="simpleFunction" data="y = step(0.5,x); "></div>
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<div class="codeAndCanvas" data="../05/step.frag"></div>
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### Tham khảo thêm
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[mix](/glossary/?lan=vi&search=mix), [smoothstep](/glossary/?lan=vi&search=smoothstep), [Các hàm số cơ bản (Hàm hình dạng - Shape function)](/05/?lan=vi)
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