learn opengl

There are three kinds of entities in OpenGL: dots, lines, triangles. For Lines, OpenGL provides us with three ways to draw lines: ① Draw Segment (lines): The so-called line segment is not connected to some of the set of lines. ② Draw Line (Line_strip): A line that is connected but not closed. ③ Draw line Ring (Line_loop): The end-connected and closed line. The first step is to implement the line segme

OpenGL is a large state machine. We implement scene rendering by changing its State. 1. Basic matrix transformation: Model Transformation: Models in mobile and transform scenarios; Projection Transformation: Crop and distort the visual space; View Angle conversion: scales the final output. Matrix Transformation Through the first three chapters, we learned how to use OpenGL to draw basic elements in 3D space

: # Default drivers if test "x $ dri_dirs" = "xyes"; then dri_dirs = "i915 i965 nouveau r200 radeon swrast" fi changed: # default drivers if test "x $ dri_dirs" = "xyes"; then dri_dirs = "nouveau r200 radeon swrast" fi Remove the Default Driver configuration, because my graphics card is integrated with ATI 3200hd graphics card, so you only need to configure the option with me. Otherwise, configure cannot pass../Config -- Build = mips64el-unknown-linux-gnu -- prefix =/usr/-- enable-gles1 -- the c

This samples shows us how to create anti-aliased font. the WGL font bitmap saved with binaries image, that means only one bit per pixel. this will cause some aliased problem as you zoom in the font. the font edge become very obvious and sharper. to address this issue we cocould use more bits like 8 bits to store one pixel, we cocould have some gray values to make the edge become transparent and more smooth. and GUNFreeTypeLibrary used to create such kind of fonts for

# Include ThisCodeThe general explanation is as follows: 1. First, add the necessary header file glut. H is included to use the function library provided by OpenGL. 2. display is a callback function written by the Program , used for drawing in a window. After registering it with the help of the main function, each time the image in the window needs to be refreshed, the display function we wrote is called. 3. The gluinitwindowsize function

Write by nine days Yan Ling (jtianling) -- blog.csdn.net/vagrxie Discuss newsgroups and documents Same paragraphProgramIn SDL with OpenGL, it is correct when glfw is used and Windows API is used to add OpenGL.As follows:Glbegin (gl_quads );Gltexcoord2f (0.0, 0.0); glvertex3f (-1.0,-1.0, 0.0 );Gltexcoord2f (1.0, 0.0); glvertex3f (1.0,-1.0, 0.0 );Gltexcoord2f (1.0, 1.0); glvertex3f (1.0, 1.0, 0.0 );Gltexcoord2f (0.0, 1.0); glvertex3f (-1.0, 1.0, 0.0

This is my second learning of OpenGL. My first learning was in the sophomore computer graphics class. It was just a careless look at OpenGL. Now, after two years, I plan to make a complete and systematic learning of OpenGL for three purposes: 1. familiar with OpenGL programming. 2.

This is my second learning of OpenGL. My first learning was in the sophomore computer graphics class. It was just a careless look at OpenGL. Now, after two years, I plan to make a complete and systematic learning of OpenGL for three purposes: 1. familiar with OpenGL programming. 2.

using pointers, as shown in the following example.These functions are identical except for the type and number of arguments. For example, the following five pieces of code are functionally equivalent:(i) Glvertex2i (1, 3);(ii) glvertex2f (1.0f, 3.0f);(iii) glvertex3f (1.0f, 3.0f, 0.0f);(d) glvertex4f (1.0f, 3.0f, 0.0f, 1.0f);(v) glfloat vertexarr3[] = {1.0f, 3.0f, 0.0f};GLVERTEX3FV (VERTEXARR3);later we will use glvertex* to represent this series of functions. Attention:Many of OpenGL's functio

.glUseProgram (mProgram ); // Get handle to vertex shader's vPosition member MPositionHandle = GLES20.glGetAttribLocation (mProgram, "vPosition "); // Enable a handle to the triangle vertices Gles20.glablevertexattribarray (mPositionHandle ); // Prepare the triangle coordinate data GLES20.glVertexAttribPointer (mPositionHandle, COORDS_PER_VERTEX, Gles‑gl _ FLOAT, false, VertexStride, vertexBuffer ); // Get handle to fragment shader's vColor member MColorHandle = GLES20.glGetUni

The openGL roaming function is simple, and the opengl roaming function Recently, when I got the openGL roaming function, I found a lot of source code on the Internet and did not achieve the expected results. Then I wrote an algorithm and shared it. The up and down keys realize shift, and the left and right keys rotate. Algorithm idea: the prototype of the observa

If we need to draw two (or more) of the same cube (or objects), just position, scale, rotation is not the same, then we can not need to the object's vertex information, color information, and so on to the video card, but sent once, drawn multiple times, just before each drawing to apply a different transformation matrix. This method is called OpenGL instancing. It is much more efficient than sending the data back to the video card every time.Look at t