Here is a method I wrote which gives you the verticies for a filled arc. There is no drawCircle function anywhere in LWJGL, you have to draw your circle using triangles, if you want to be more efficient a triangle fan is better. GlDisable(GL_CULL_FACE) // just to test drawing LWJGL and openGL really have nothing to do with this and whether you use glDrawArrays or glBegin doesn't matter. glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST) Window = glfwCreateWindow(width, height, "Game", NULL, NULL) GlfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE) GlfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3) GlfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3) GlBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0) GlBufferData(GL_ELEMENT_ARRAY_BUFFER, eb, GL_STATIC_DRAW) GlBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexVBO) GlVertexAttribPointer(1, 3, GL_FLOAT, false, 6 * (Float.SIZE / Byte.SIZE) * 3, 3 * (Float.SIZE / Byte.SIZE)) GlVertexAttribPointer(0, 3, GL_FLOAT, false, 6 * (Float.SIZE / Byte.SIZE) * 3, 0) GlBufferData(GL_ARRAY_BUFFER, cb, GL_STATIC_DRAW) IntBuffer eb = BufferUtils.createIntBuffer(elementArray.length) 2) Without user interaction: The radius value would be specified in the program itself. There are two ways to do this: 1) With user interaction: Program will prompt user to enter the radius of the circle.
ViewProjMatrixLocation = glGetUniformLocation(program, "viewProjMatrix") ĬolorLocation = glGetUniformLocation(program, "color") įloatBuffer cb = BufferUtils.createFloatBuffer(colorArray.length) įloatBuffer vb = BufferUtils.createFloatBuffer(vertexArray.length) In this tutorial we will see how to calculate area and circumference of circle in Java. Int fs = glCreateShader(GL_FRAGMENT_SHADER) " gl_Position = viewProjMatrix * vec4(position, 1.0) \n" +
"layout(location=0) in vec3 position \n" + Int vs = glCreateShader(GL_VERTEX_SHADER) Matrix4f viewProjMatrix = new Matrix4f() įloatBuffer fb = BufferUtils.createFloatBuffer(16)
Other than that I can't seem to figure out what the problem is.Īnyway, my question is how can the shader code be fixed to show a cube? I've searched for days trying to find the answer, so any help would be appreciated. I also turned off backface culling and made sure the znear and zfar was set correctly. In JavaFX a circle is represented by the class. A circle is defined by its center and radius distance from the center to any point on the circle. I tried making the cube large, so if it was behind the camera, it would still be visible. A circle is a line forming a closed loop, every point on which is a fixed distance from a center point. When I looked at the lwjglx debug output it didn't show any errors. So then I went on to add shaders and it all broke. It was using vbos and indicies and it did draw a colored cube like it should. The program worked fine until I added shaders. So I made a program to draw a simple cube with colors at each vertex.