{"id":11166,"date":"2022-01-31T10:35:25","date_gmt":"2022-01-31T02:35:25","guid":{"rendered":"https:\/\/www.bookcard.net\/wordpress\/?p=11166"},"modified":"2022-01-31T10:35:25","modified_gmt":"2022-01-31T02:35:25","slug":"android_studio_ndk_opengl_es_game_coord","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/android_studio_ndk_opengl_es_game_coord\/","title":{"rendered":"Android Studio NDK-OpenGL ES \u89f8\u5c4f\u5750\u6a19\u8f49\u6e38\u3c46\u5750\u6a19"},"content":{"rendered":"
\"Android<\/a>
Android Studio NDK-OpenGL ES \u89f8\u5c4f\u5750\u6a19\u8f49\u6e38\u3c46\u5750\u6a19<\/figcaption><\/figure>\n

\u300e\u89f8\u5c4f\u5750\u6a19<\/a>\u300f\u300ex,y\u300f\u5750\u6a19\u8f49\u300e\u6b63\u4ea4\u6295\u5f71\u300f\u5750\u6a19, \u300e\u8996\u9310\u9ad4\u89e3\u50cf\u300f\u5bec\u9ad8, \u6bd4\u4f8b\u9700\u624b\u6a5f\u89e3\u50cf\u5bec\u9ad8\u6bd4\u58f9\u81f4.<\/p>\n

\u8a08\u5c4f\u5e55\u5bec\u9ad8\u6bd4<\/p>\n\n\n\n
float aspect_ratio = (float)cam->real_width \/ (float)cam->real_height;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u300e\u8996\u9310\u9ad4\u89e3\u50cf\u300f\u5bec\u9ad8,\u6b64\u6642\u5b9a\u7fa9\u300e\u9ad8\u300f800pix<\/p>\n\n\n\n\n
float frustum_width\u00a0\u00a0\u00a0 = 800 *aspect_ratio;<\/td>\n<\/tr>\n
float frustum_height\u00a0\u00a0 = 800 ;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\u300e\u6b63\u4ea4\u6295\u5f71\u300f\u4ee3\u78bc<\/p>\n

\u91cd\u7f6e\u8996\u5340\u5c3a\u5bf8, \u503c\u4fc2\u624b\u6a5f\u89e3\u50cf\u5bec\u9ad8<\/p>\n\n\n\n
::glViewport(0,0,real_width,real_height);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8a2d\u5b9a\u6295\u5f71\u77e9\u9663<\/p>\n\n\n\n
::glMatrixMode(GL_PROJECTION);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8f09\u5165\u55ae\u4f4d\u77e9\u9663<\/p>\n\n\n\n
::glLoadIdentity();<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6b63\u4ea4\u6295\u5f71, \u6e38\u6232\u5750\u6a19\u539f\u9ede(0,0,0)\u70ba\u65bc\u5c4f\u5e55\u4e2d\u5fc3<\/p>\n\n\n\n
glOrthof(frustum_width \/ 2, frustum_width \/ 2, -frustum_height \/ 2, frustum_height \/ 2, pos.y – 10, far_clip_z);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8a2d\u5b9a\u6a21\u578b\u8996\u5716\u77e9\u9663<\/p>\n\n\n\n
::glMatrixMode(GL_MODELVIEW);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8f09\u5165\u55ae\u4f4d\u77e9\u9663<\/p>\n\n\n\n
::glLoadIdentity();<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\u624b\u6307\u89e6\u6478\u624b\u6a5f\u5c4f\u5e55onTouch()<\/a> \u6240\u5f97\u5750\u6a19\u9700\u8f49\u6e38\u6232\u4e16\u754c\u5750\u6a19,\u6b63\u4ea4\u6295\u5f71OpenGL\u6e38\u3c46+Z\u8ef8\u6307\u5411\u5c4f\u5e55\u6df1\u8655.<\/p>\n\n\n\n\n
float touch3Dx = (touch2Dx \/ real_width) * frustum_width\u00a0 ;<\/td>\n<\/tr>\n
float touch3Dz = (touch2Dy \/real_height) * frustum_height\u00a0 ;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8a083D\u76f8\u6a5f\u4f4d\u7f6e<\/p>\n\n\n\n\n
touch3Dx = touch3Dx + camPosX;<\/td>\n<\/tr>\n
touch3Dz = touch3Dz + camPosX;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6e38\u6232\u5750\u6a19\u539f\u9ede(0,0,0)\u70ba\u65bc\u5c4f\u5e55\u4e2d\u5fc3<\/p>\n\n\n\n\n
touch3Dx = touch3Dx – (frustum_width \/ 2.0f);<\/td>\n<\/tr>\n
touch3Dz = touch3Dz – (frustum_height \/ 2.0f);<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u300e\u89f8\u5c4f\u5750\u6a19\u300f\u300ex,y\u300f\u5750\u6a19\u8f49\u300e\u6b63\u4ea4\u6295\u5f71\u300f\u5750\u6a19, \u300e\u8996\u9310\u9ad4\u89e3\u50cf\u300f\u5bec\u9ad8, \u6bd4\u4f8b\u9700\u624b\u6a5f\u89e3\u50cf\u5bec\u9ad8\u6bd4\u58f9\u81f4. \u8a08\u5c4f\u5e55\u5bec\u9ad8\u6bd4 … <\/p>\n

\u7e7c\u7e8c\u95b1\u8b80 Android Studio NDK-OpenGL ES \u89f8\u5c4f\u5750\u6a19\u8f49\u6e38\u3c46\u5750\u6a19<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,62],"tags":[2,50],"class_list":["post-11166","post","type-post","status-publish","format-standard","hentry","category-android","category-opengl","tag-android","tag-opengl","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/11166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/comments?post=11166"}],"version-history":[{"count":1,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/11166\/revisions"}],"predecessor-version":[{"id":11168,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/11166\/revisions\/11168"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=11166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=11166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=11166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}