/**
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* Compares <code>left</code> and <code>right</code> componentwise. Returns <code>true</code>
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* if they are within <code>epsilon</code> and <code>false</code> otherwise. The inputs
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* <code>left</code> and <code>right</code> can be <code>float</code>s, <code>vec2</code>s,
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* <code>vec3</code>s, or <code>vec4</code>s.
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*
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* @name czm_equalsEpsilon
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* @glslFunction
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*
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* @param {} left The first vector.
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* @param {} right The second vector.
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* @param {float} epsilon The epsilon to use for equality testing.
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* @returns {bool} <code>true</code> if the components are within <code>epsilon</code> and <code>false</code> otherwise.
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*
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* @example
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* // GLSL declarations
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* bool czm_equalsEpsilon(float left, float right, float epsilon);
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* bool czm_equalsEpsilon(vec2 left, vec2 right, float epsilon);
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* bool czm_equalsEpsilon(vec3 left, vec3 right, float epsilon);
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* bool czm_equalsEpsilon(vec4 left, vec4 right, float epsilon);
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*/
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bool czm_equalsEpsilon(vec4 left, vec4 right, float epsilon) {
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return all(lessThanEqual(abs(left - right), vec4(epsilon)));
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}
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bool czm_equalsEpsilon(vec3 left, vec3 right, float epsilon) {
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return all(lessThanEqual(abs(left - right), vec3(epsilon)));
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}
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bool czm_equalsEpsilon(vec2 left, vec2 right, float epsilon) {
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return all(lessThanEqual(abs(left - right), vec2(epsilon)));
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}
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bool czm_equalsEpsilon(float left, float right, float epsilon) {
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return (abs(left - right) <= epsilon);
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}
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