opengl tutorial c

GLUTTutorial Animation So far, we have an OpenGL window with a white triangle, but it is not exciting at all. Now let's go to this tutorial to rotate the triangle. Let's go back to the main () function and add some additional settings. First, tell glut that we want a dual-buffer. The dual buffer creates a smooth animation by painting in the latter buffer and constantly switching the front and back buf

Lesson 1Spherical ing: This will teach you how to wrap the environment texture on your 3D model and make it look like it reflects the surrounding scenes.Sphere environment ing is a method for creating fast metal reflection effects, but it is not as accurate as in the real world! We will create this tutorial from the code of Lesson 18 and teach you how to create this effect.At the beginning, let's take a look at the introduction in hongbao. It defines

; // increase the rotation variable of the triangle (new)Rquad-= 0.15f; // reduce the rotation variable of the Quadrilateral (new)Return true; // continue running} This lesson is over again. Now you have mastered how to create objects in 3D space. The OpenGL screen must be imagined as a large drawing paper with many transparent layers. It is almost a cube composed of a large number of points. These points are filled with cubes from left to ri

tutorial code, we wrapped these common functions and created the technique class, its Inheritance class will focus mainly on shader special effects. Each technique must first call the init function for instantiation. The derived class of techniqu must first call the init function of the base class (this function creates an OpenGL program object ), you can also add your own private functions. After a techni

The size of the point defaults to 1 pixels, but it can also be changed. The changed command is glpointsize, and its function prototype is as follows:void Glpointsize (glfloat size);Size must be greater than 0.0f and the default value is 1.0f, in pixels.Note: For specific OpenGL implementations, there is a limit to the size of the point, and if you set a size that exceeds the maximum value, the setting may haveProblem.Examplevoid Mydisplay (void){Glcle

1. OpenGL development Environment Construction Reference http://brothergrup.iteye.com/blog/16024712. Fill the color of the triangle:The Fill color function for Glcolor (3/4) * (R,G,B) 3 or 4 means that the numeric type rgb/rgba;* represents Rgba (B,i.) will eventually be mapped to [0-1].How to map is to take the value of the Write/current type maximum value such as Byte is -128~127 glcolor3b (1,0,0) equivalent to glcolor3f (1/127f,0,0) less than 0 whe

Original post address: http://ogldev.atspace.co.uk/www/tutorial05/tutorial05.html In this tutorial, we will be exposed to a new shader variable uniform variables. The difference between this variable and the attribute variable is that when each vertex shader is called, the corresponding attribute values of the vertex are loaded from the vertex buffer according to the position of the attribute, while the uniform variable remains unchanged for each dra

OpenGL Tutorial Translator 13th lesson camera SpaceOriginal Address: http://ogldev.atspace.co.uk/(source code please download from the original page)BackgroundIn the last few sections we see two types of vertex transformations. The first type of transformation is to change the position of the object (pan), rotate, dimension (indent). These transformations allow us to place an object anywhere in the 3D world

status = false; // Status Indicator Now we create an image record that stores bitmap. The record contains the width, height, and data of the bitmap. Aux_rgbimagerec * textureimage [1]; // create a texture Bucket Clear image records and make sure the content is empty. Memset (textureimage, 0, sizeof (void *) * 1); // set the pointer to null Now load the bitmap and convert it to a texture.Textureimage [0] = loadbmp ("Data/nehe.bmp ")CallLoadbmp (). Loa

Original post address: http://ogldev.atspace.co.uk/www/tutorial06/tutorial06.html In this tutorial, we start to change the position of a 3D object, such as translation, rotation, scaling, and so on. The operations of object location changes are usually implemented through matrices. Each change is represented by a matrix. If an object performs multiple location operations, the corresponding matrices can be multiplied, multiply the coordinates of the v

GLUT Tutorial Keyboard example ------ Scenario roaming II In this section, let's take a look at the previous example. This time we will use advanced keyboard control. In the initialization section, we have two variables: deltaangle and deltamode. These variables control rotation and movement of cameras. When the value is not 0, the camera performs some operations. When the value is 0, the camera does not move. The initial values of these two variable

GLUT Tutorial Sub-menuIn the previous chapter, we learned how to create a simple menu. Now let's take a look at how to add a cascading submenu. The creation of sub-menus is the same as the function used to create menus. After creating a menu, we add the Sub-menu as an entry. Use the function maid to do this: void maid (char * entryname, int menuindex); parameter: entryname: Sub menu name. Menuindex: Sub-menu index. This is the value returned by the s

Lesson 1Besell surface: This is a course about mathematical operations, and there is nothing else. Come on, look at it with confidence.Besell Surface By David nikdel (ogapo@ithink.net) This tutorial is intended to introduce the surface of besell. I hope someone who knows more about art can use her to make some cool stuff and show it to everyone. In this tutorial, you cannot create a complete shell database.

GLUT Tutorial MouseIn the previous sections, we saw how to use the keyboard function of GLUT to increase the interaction of an OpenGL program. Now it's time to study the mouse. The glut mouse interface provides some column options to increase the interaction of the mouse. That is, to detect mouse clicks and move the mouse. Detect mouse ClicksLike keyboard processing, Glut provides a method for registering

Nehe OpenGL tutorial (Chinese and English versions with VC ++ source code) Lesson 01-Lesson 02 Create an OpenGL window: How to Create a triangle and a quadrilateral Http://ieee.org.cn/dispbbs.asp? Boardid = 61 id = 53679 Lesson 03-Lesson 04Add colorRotateHttp://ieee.org.cn/dispbbs.asp? Boardid = 61 id = 53682 Lesson 05-Lesson 063D spaceTexture in

If you have a pThread.h not found error when you use Cmake-g Xcode-wno-dev opengl_tutorial, it happens that you and I use the same version of the 2.8 cmake.Then try the Brew install CMake to install the latest version of the 3.0.2 CMake.OpenGL Tutorial Resources:first go to the URL [1], download the source code, unzip and use Cmake-g Xcode-wno-dev./opengl_tutorial generate the Xcode project file.Then you can watch the

Lesson 1Moving Images in 3D space: You want to know how to move objects in 3D space, how to draw an image on the screen, and make the background color transparent, you want to have a simple animation. This lesson will teach you everything. The previous course covers the basic OpenGL, and each course is created on the basis of the previous lesson. This course is a combination of the previous knowledge. When you are studying this lesson, make sure that

The square shown in the previous example is white, which is not very attractive. This article describes how to add colors to mesh. OpenGL ES uses color as the well-known rgba mode (red, green, blue, transparency ). The definition of color usually uses the hex format 0xff00ff or the decimal format (255, 0, 255), but uses 0 in OpenGL... A floating point between 1. 0 is 0, 1 is equivalent to 255 (0xff ). The s

, texture [0]) tells OpenGL that we want to generate a texture name (if you want to load multiple textures, increase the number ). It is worth noting that at first we use gluint texture [1] to create a texture storage space. You may think that the first texture is stored in texture [1, but this is wrong. The correct address is texture [0]. Similarly, if gluint texture [2] is used, the second texture is stored in texture [1. "NOTE: there should be n

Lesson 1Rotation: In this lesson, I will teach you how to rotate triangles and quadrilateral. The triangle in the left graph rotates along the Y axis, and the Quadrilateral rotates along the X axis.In the previous lesson, I will teach you how to color triangles and quadrilateral. This lesson will teach you how to rotate these color objects around the axis.In fact, you only need to add a few lines to the code of the previous lesson. Next I will rewrite the entire routine. So that you can know wha