Baseline Widely available
WebGLRenderingContext.drawElements() 㯠WebGL API ã®ã¡ã½ããã§ãé
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drawElements(mode, count, type, offset);
mode
GLenum ã§ãæç»ããããªããã£ãã®åãæå®ãã¾ããåãããå¤ã¯æ¬¡ã®éãã§ãã
gl.POINTS: åä¸ã®ç¹ãæãã¾ããgl.LINE_STRIP: ç´ç·ã次ã®é ç¹ã«åãã¦æãã¾ããgl.LINE_LOOP: ç´ç·ã次ã®é ç¹ã«åãã¦æããæå¾ã®é ç¹ãæåã®é ç¹ã«æ¥ç¶ãã¾ããgl.LINES: 2 ã¤ã®é ç¹ã®éã«ç·ãæãã¾ããgl.TRIANGLE_STRIPgl.TRIANGLE_FANgl.TRIANGLES: 3 ã¤ã®é ç¹ã®ã°ã«ã¼ãã§ä¸è§å½¢ãæãã¾ããGLsizei ã§ãã¬ã³ããªã³ã°ããè¦ç´ é
åãããã¡ã¼ã®è¦ç´ æ°ãæå®ãã¾ããä¾ãã°ã gl.LINES ã使ã£ã¦ã¯ã¤ã¤ã¼ãã¬ã¼ã ã®ä¸è§å½¢ãæãå ´åãç· 1 æ¬ããã 2 ã¤ã®ç«¯ç¹Ã 3 æ¬ ï¼ 6 è¦ç´ ã«ãªãã¾ããããããåãã¯ã¤ã¤ã¼ãã¬ã¼ã ã®ä¸è§å½¢ã gl.LINE_STRIP ã§æç»ããå ´åãè¦ç´ é
åãããã¡ã¼ã¯ 1 æ¬ç®ã®çµç¹/ 2 æ¬ç®ã®å§ç¹ã 2 æ¬ç®ã®çµç¹/ 3 æ¬ç®ã®å§ç¹ã®ã¤ã³ããã¯ã¹ãç¹°ãè¿ããªãã®ã§ã count 㯠4 åã¨ãªãã¾ããåãä¸è§å½¢ã gl.LINE_LOOP ã§æç»ããå ´åãè¦ç´ é
åãããã¡ã¼ã¯æåã¨æå¾ã®é ç¹ãç¹°ãè¿ããªãã®ã§ã count 㯠3 ã¨ãªãã¾ãã
GLenum ã§ãè¦ç´ ã®é
åãããã¡ã¼ã®å¤ã®åãæå®ãã¾ããåãããå¤ã¯æ¬¡ã®éãã§ãã
gl.UNSIGNED_BYTEgl.UNSIGNED_SHORTOES_element_index_uint æ¡å¼µã使ç¨ããå ´å:
gl.UNSIGNED_INTGLintptr ã§ãè¦ç´ ã®é
åãããã¡ã¼å
ã«ãããåã¨ãªãã»ãããæå®ãã¾ããæå®ããã type ã®å¤§ããã®æ£ããåæ°ã§ãªããã°ãªãã¾ããã
ãªã (undefined)ã
mode ãåãä»ããããå¤ã®ãããã§ããªãã£ãå ´åã gl.INVALID_ENUM ã¨ã©ã¼ãçºçãã¾ããoffset ãæå®ãããåã®æ£ããåæ°ã§ãªããã°ã gl.INVALID_OPERATION ã¨ã©ã¼ãçºçãã¾ããcount ãè² ã®æ°ã§ãã£ãå ´åã¯ã gl.INVALID_VALUE ã¨ã©ã¼ãçºçãã¾ããgl.drawElements(gl.POINTS, 8, gl.UNSIGNED_BYTE, 0);
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