Baseline Widely available
WebGL API ã® WebGLRenderingContext.clearColor() ã¡ã½ããã¯ãã«ã©ã¼ãããã¡ã¼ã®æ¶å»ã«ä½¿ãããè²ã®å¤ãæå®ãã¾ãã
ãã®æå®ã¯ clear() ã¡ã½ãããå¼ãã ã¨ãã«ä½¿ç¨ãããè²ã§ããå¤ã¯ 0 ãã 1 ã«ä¸¸ãããã¾ãã
void gl.clearColor(red, green, blue, alpha);å¼æ°
red
赤è²ãæå®ãã GLclampf ã§ãã«ã©ã¼ãããã¡ã¼ã®æ¶å»ã«ä½¿ããã¾ããæ¢å®å¤ã¯ 0 ã§ãã
green
ç·è²ãæå®ãã GLclampf ã§ãã«ã©ã¼ãããã¡ã¼ã®æ¶å»ã«ä½¿ããã¾ããæ¢å®å¤ã¯ 0 ã§ãã
blue
éè²ãæå®ãã GLclampf ã§ãã«ã©ã¼ãããã¡ã¼ã®æ¶å»ã«ä½¿ããã¾ããæ¢å®å¤ã¯ 0 ã§ãã
alpha
ã¢ã«ãã¡ (ä¸éæ度) ãæå®ãã GLclampf ã§ãã«ã©ã¼ãããã¡ã¼ã®æ¶å»ã«ä½¿ããã¾ããæ¢å®å¤ã¯ 0 ã§ãã
ããã¾ããã
ä¾gl.clearColor(1, 0.5, 0.5, 3);
ç¾å¨ã®æ¶å»ã«ä½¿ãããè²ãåå¾ããã«ã¯ãCOLOR_CLEAR_VALUE å®æ°ã§åãåããã㨠Float32Array ãè¿ãã¾ãã
gl.getParameter(gl.COLOR_CLEAR_VALUE);
// Float32Array[1, 0.5, 0.5, 1]
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