{"id":4474,"date":"2018-08-29T22:05:59","date_gmt":"2018-08-29T14:05:59","guid":{"rendered":"http:\/\/www.bookcard.net\/wordpress\/?p=4474"},"modified":"2018-10-14T21:27:35","modified_gmt":"2018-10-14T13:27:35","slug":"android_game_blend_alpha","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/android_game_blend_alpha\/","title":{"rendered":"Android\u904a\u6232\u4e4b\u900f\u660e\u6df7\u5408"},"content":{"rendered":"
\"\"<\/a>
Android\u904a\u6232\u4e4b\u900f\u660e\u6df7\u5408<\/figcaption><\/figure>\n

OpenGL<\/span>\u8981\u555f\u7528\u6df7\u5408<\/span>,<\/span>\u8981\u5c07\u6bcf\u500b\u9802\u9ede\u984f\u8272<\/span>ALPHA<\/span>\u5206\u91cf\u7f6e\u8a2d\u70ba<\/span>0.5f.<\/span>\u9019\u6a23\u6a21\u578b\u5f8c\u65b9\u5c0d\u8c61\u90fd\u80fd\u900f\u904e\u6a21\u578b\u7747\u5230<\/span><\/p>\n

1.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>OpenGL ES <\/span>\u5c07\u5728\u300e\u6df1\u5ea6\u7de9\u5b58<\/span>Z-Buffer<\/span>\u300f\u548c\u300e\u5e40\u7de9\u5b58\u300f\u4e2d\u6e32\u67d3\u6a21\u578b<\/span><\/p>\n

2.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u7576<\/span>OpenGL ES<\/span>\u7d50\u5408<\/span>z-buffer<\/span>\u555f\u7528\u6df7\u5408\u6642<\/span>.<\/span>\u5fc5\u9700\u78ba\u4fdd\u6240\u6709\u900f\u9762\u5c0d\u8c61\u8ddf\u64da\u5176\u8ddd\u96e2\u7167\u76f8\u6a5f\u9060\u8fd1\u6309\u5347\u5e8f\u6392\u5e8f<\/span>.<\/span>\u4e26\u4e14\u5f9e\u5f8c\u5f80\u7dda\u6e32\u67d3\u5c0d\u8c61<\/span>.<\/span>\u6240\u6709\u975e\u900f\u660e\u5fc5\u9808\u5728\u900f\u660e\u5c0d\u8c61\u4e4b\u524d\u88ab\u6e32\u67d3<\/span>,<\/span>\u800c\u975e\u900f\u660e\u5c0d\u8c61\u4e0d\u9700\u8981\u7d93\u904e\u6392\u5e8f<\/span><\/p>\n

\u555f\u7528\u6df7\u5408<\/span>:<\/span><\/p>\n

1.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u555f\u7528\u6df1\u5ea6\u6aa2\u6e2c<\/span>(Z<\/span>\u8ef8\u7de9\u5b58<\/span>)<\/span>\u4e00\u5b9a\u8981\u8abf\u7528<\/span>glEnable(GL_DEPTH_TEST);.<\/span>\u4fdd\u8b49\u5149\u7167\u6b63\u78ba\u7e6a\u88fd\u548c\u6a21\u5f62\u524d\u5f8c\u6b63\u78ba\u7e6a\u88fd<\/span><\/p>\n

2.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u555f\u7528\u6df7\u5408<\/span>gl.glEnable(GL10.GL_BLEND);<\/span><\/p>\n

3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u8a2d\u5b9a\u6df7\u5408\u65b9\u7a0b\u5f0f<\/span>gl.glBlendFunc(GL10.GL_SRC_ALPHA,GL10.GL_ONE_MINUS_SRC_ALPHA);<\/span><\/p>\n

4.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u8a2d\u5b9a\u6a21\u578b\u900f\u660e\u5ea6<\/span>gl.glColor4f(1.0f, 1.0f, 1.0f,0.5f);<\/span><\/p>\n

5.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u5b8c\u6210\u6e32\u67d3\u5f8c\u7981\u7528\u6df7\u5408<\/span>glDisable(GL_BLEND);<\/span><\/p>\n

\u7576\u9700\u8981\u5728<\/span>OpenGL ES<\/span>\u4e2d\u555f\u7528\u6df7\u5408<\/span>.<\/span>\u9700\u8981\u6309\u4ee5\u4e0b\u65b9\u5f0f\u6e32\u67d3<\/span><\/p>\n

1.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u9996\u5148\u6e32\u67d3\u6240\u6709\u4e0d\u900f\u660e\u5c0d\u8c61<\/span><\/p>\n

2.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u5c07\u6240\u6709\u900f\u660e\u5c0d\u8c61\u6309\u7167\u5176\u8207\u76f8\u6a5f\u8ddd\u96e2\u904b\u8fd1\u6392\u5e8f<\/span>(<\/span>\u7531\u9060\u53ca\u8fd1<\/span>)<\/span><\/p>\n

3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span><\/span><\/span>\u6e32\u67d3\u6392\u597d\u5e8f\u900f\u660e\u5c0d\u8c61<\/span>(<\/span>\u7531\u9060\u53ca\u8fd1<\/span>)<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

\u6df7\u5408\u4fc2\u6578<\/span><\/p>\n<\/td>\n

\n

\u7c21\u4ecb<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_ZERO<\/span><\/p>\n<\/td>\n

\n

\u5c07\u984f\u8272\u8a2d\u70ba<\/span>{0,0,0,0}<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_ONE<\/span><\/p>\n<\/td>\n

\n

\u4e0d\u6539\u8b8a\u7576\u524d\u984f\u8272<\/span>(r,g,b,a)*(1,1,1,1)<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_SRC_COLOR<\/span><\/p>\n<\/td>\n

\n

\u76ee\u6a19\u8207\u4f86\u6e90\u76f8\u4e58<\/span>dest (r,g,b,a)* sour (r,g,b,a)<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_DST_COLOR<\/span><\/p>\n<\/td>\n

\n

\u4f86\u6e90\u8207\u76ee\u6a19\u76f8\u4e58<\/span>sour (r,g,b,a)* dest (r,g,b,a)<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_ONE_MINUS_SRC_COLOR<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a)*((1,1,1,1)- sour(r,g,b,a))<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_ONE_MINUS_DST_COLOR<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a)*((1,1,1,1)- dest(r,g,b,a))<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_SRC_ALPHA<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a) * sour(alpha) <\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_DST_ALPHA<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a) * dest(alpha)<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_ONE_MINUS_SRC_ALPHA<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a) * (1- sour(alpha))<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_ONE_MINUS_DST_ALPHA<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a) * (1- dest(alpha))<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

GL_SRC_ALPHA_SATURATE<\/span><\/p>\n<\/td>\n

\n

(r,g,b,a) *MIN (sour(alpha),1-dest(alpha))<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

OpenGL\u8981\u555f\u7528\u6df7\u5408,\u8981\u5c07\u6bcf\u500b\u9802\u9ede\u984f\u8272ALPHA\u5206\u91cf\u7f6e\u8a2d\u70ba0.5f.\u9019\u6a23\u6a21\u578b\u5f8c\u65b9\u5c0d\u8c61\u90fd\u80fd\u900f\u904e\u6a21\u578b\u7747\u5230 1.\u00a0 … <\/p>\n

\u7e7c\u7e8c\u95b1\u8b80 Android\u904a\u6232\u4e4b\u900f\u660e\u6df7\u5408<\/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-4474","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\/4474","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=4474"}],"version-history":[{"count":3,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4474\/revisions"}],"predecessor-version":[{"id":4479,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4474\/revisions\/4479"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=4474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=4474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=4474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}