MvpMatrix = cube. When you finished initialization of your cube, get the MVPMatrix from it directly using : cube = new Cube(.) Private final double mModelMatrix = new double Private double mvpMatrixValue = new double In our custom Renderer which is a subclass of RajawaliRenderer, add these variables : private Matrix4 mvpMatrix So I add another uniform variable here, named it uCMVPMatrix. The matrix cannot be correctly passed into vertex shader. Although Rajawali provides us method like tMVPMatrix(mvpMatrix) to set MVPMatrix, I found it not working correctly. In Rajawali, we can also use MVPMatrix to rotate the object. As others have mentioned, this won't smooth polygon edges, but it will create antialiased lines. It may also help to set the line width to a non-integral width. Try: glEnable (GLBLEND) glBlendFunc (GLSRCALPHA, GLONEMINUSSRCALPHA) and then drawing lines. Design : This API is defined as a set of functions which may be called by the client program. 6 Answers Sorted by: 23 You also need to turn on blending for line smoothing to work. OpenGL API is designed mostly in hardware. 0 īottomY = - vWidth * vScaleY + lineWidth Open Graphics Library (OpenGL) is a cross-language (language independent), cross-platform (platform-independent) API for rendering 2D and 3D Vector Graphics (use of polygons to represent image). Vec4 newColor = vec4( 0.0, 0.0, 0.0, 1.0) įloat x = min(vTextureCoord.s, 1.0 - vTextureCoord.s) įloat y = min(vTextureCoord.t, 1.0 - vTextureCoord.t)

In order to draw wireframe using fragment shader, we can simply use following fragement shader : precision mediump float So you will see a cube full of lines, doesn’t it look messy to you? But because a Cube, or we can say, every Polygons or 3D Objects in OpenGL are formed by lots of dots, lines and triangles, setting drawing mode will only show you such images like below :Īlso, when you set DrawingMode to GL_LINE_STRIP, your custom vertex or fragment shader won’t work as usual. To tell the cube to draw in wireframe mode. There are several ways to draw a wireframe for a cube in Rajawali engine. This will be my first blog totally written in english.Īndroid OpenGL ES 2.0/3.0 Engine Rajawali First Discuss Android, GLSL, OpenGL ES, Shader, Wireframe How to draw a Wireframe Shader for a Cube in Rajawali under OpenGL ES 2.0

Opengl es 2.0 draw line