{"id":73,"date":"2021-01-26T23:00:20","date_gmt":"2021-01-26T15:00:20","guid":{"rendered":"https:\/\/playerzhou.com\/blog\/?p=73"},"modified":"2021-02-24T12:34:53","modified_gmt":"2021-02-24T04:34:53","slug":"%e8%87%aa%e5%88%b6%e7%ae%80%e6%98%93%e7%9a%84%e8%bd%af%e5%85%89%e6%a0%85%e6%b8%b2%e6%9f%93%e5%99%a8%ef%bc%881%ef%bc%89","status":"publish","type":"post","link":"https:\/\/playerzhou.com\/blog\/?p=73","title":{"rendered":"\u81ea\u5236\u7b80\u6613\u7684\u8f6f\u5149\u6805\u6e32\u67d3\u5668\uff081\uff09"},"content":{"rendered":"\n

\u9879\u76ee\u5730\u5740\uff1ahttps:\/\/github.com\/OmegaZhou\/SimpleRender<\/a> er<\/p>\n\n\n

\u7ed8\u5236\u7ebf\u6bb5<\/h2>\n\n\n

Bresenham\u2019s Line\u7b97\u6cd5<\/h3>\n\n\n
  • \u9996\u5148\u8981\u5b9e\u73b0\u7684\u5c31\u662f\u5728\u5c4f\u5e55\u4e2d\u753b\u4e00\u6761\u7ebf\uff0c\u5b9a\u4e49\u51fd\u6570drawLine(p1:Vector2,p2:Vector2,color:Color)<\/code>\uff0c\u5176\u4e2dp1<\/code>\u548cp2<\/code>\u5206\u522b\u662f\u7ebf\u6bb5\u7684\u8d77\u70b9\u548c\u7ec8\u70b9<\/li>
  • Bresenham\u2019s Line\u7b97\u6cd5\u5c31\u4e0d\u518d\u9610\u8ff0\u4e86\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0bdrawLine(p1:Vector2,p2:Vector2,color:Color){
           let x1=Math.round(p1.x);
           let x2=Math.round(p2.x);
           let y1=Math.round(p1.y);
           let y2=Math.round(p2.y);
           let steep=false
           if(Math.abs(x1-x2)<Math.abs(y1-y2)){
              [x1,y1]=[y1,x1];
              [x2,y2]=[y2,x2];
               steep=true;
          }
           if(x1>x2){
              [x1,x2]=[x2,x1];
              [y1,y2]=[y2,y1];
          }
           let dx=Math.abs(x2-x1);
           let dy=Math.abs(y2-y1);
           let derr=dy*2;
           let dis=(y1<y2)?1:-1;
           let error=0;
           for(let x=x1,y=y1;x<=x2;++x){
               if(steep){
                   this.setPixel(x,y,color)
                   
              }else{
                   this.setPixel(y,x,color)
              }
               error+=derr;
               if(error>dx){
                   y+=dis;
                   error-=2*dx;
              }
          }
    \u200b
      }<\/code><\/li><\/ul>\n\n\n

    \u53cd\u8d70\u6837<\/h3>\n\n\n
    • \u91c7\u7528Bresenham\u2019s Line\u7b97\u6cd5\u5b9e\u73b0\u4e86\u7ed8\u5236\u4e4b\u540e\uff0c\u6211\u53d1\u73b0\u5bf9\u4e8e\u659c\u7ebf\u6bb5\uff0c\u952f\u9f7f\u611f\u660e\u663e<\/li>
    • \u56e0\u6b64\u9700\u8981\u8fdb\u884c\u53cd\u8d70\u6837\u64cd\u4f5c\uff0c\u8fd9\u91cc\u6211\u91c7\u7528\u7684\u662f\u5bf9\u7ebf\u6bb5\u5468\u56f4\u7684\u50cf\u7d20\u8fdb\u884c\u6a21\u7cca\u64cd\u4f5c<\/li>
    • \u6211\u4f7f\u7528\u7684\u6a21\u7cca\u64cd\u4f5c\u6bd4\u8f83\u7b80\u5355\uff0c\u76f4\u63a5\u4ee4\u76f8\u5e94\u50cf\u7d20\u4e0e\u5468\u56f4\u50cf\u7d20\u7684\u989c\u8272\u53d6\u5e73\u5747\u503c<\/li>
    • \u4ee5\u4e0b\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u662f\u672a\u91c7\u7528\u53cd\u8d70\u6837\u3001\u91c7\u7528\u53cd\u8d70\u6837\u4ee5\u53ca\u4f7f\u7528canvas\u81ea\u5e26\u7ed8\u5236API\u5f97\u5230\u7684\u540c\u4e00\u6761\u76f4\u7ebf
      \"\"<\/li>
    • \u53ef\u4ee5\u770b\u5230\u6700\u5de6\u8fb9\u7684\u7ebf\u6bb5\u952f\u9f7f\u72b6\u660e\u663e\uff0c\u4e2d\u95f4\u7684\u7ebf\u6bb5\u867d\u4e0d\u5982\u53f3\u7aef\uff0c\u4f46\u6bd4\u8d77\u5de6\u7aef\u6548\u679c\u660e\u663e\u53d8\u597d\uff0c\u7f3a\u9677\u662f\u7531\u4e8e\u6211\u662f\u5bf9\u5468\u56f4\u7ebf\u6bb5\u8fdb\u884c\u7684\u53cd\u8d70\u6837\u64cd\u4f5c\uff0c\u7ebf\u6bb5\u53d8\u5f97\u8f83\u7c97
      <\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"

      \u9879\u76ee\u5730\u5740\uff1ahttps:\/\/github.com\/OmegaZhou\/SimpleRender er \u7ed8\u5236\u7ebf\u6bb5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9,3],"tags":[],"_links":{"self":[{"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/73"}],"collection":[{"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=73"}],"version-history":[{"count":3,"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":108,"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/73\/revisions\/108"}],"wp:attachment":[{"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/playerzhou.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}