camera-project:将 3D 点投影到 2D 窗口空间

相机项目 将 3D 世界点投影到 2D 窗口空间。 var mat4 = require ( 'gl-mat4' ) var project = require ( 'camera-project' ) //projection * view matrix var combinedProjView = mat4 . multiply ( [ ] , projection , view ) //viewport bounds var viewport = [ x , y , width , height ] //3D world point var point = [ 0 , - 1 , 2.5 ] //vec4 output var output = [ ] project ( output , point , viewport , combinedProjView ) 输出z分量