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Since OpenGL is a graphics API and not a platform of its own, it requires a language to operate in and the language of choice is C++ .
How much C++ is required for OpenGL?
You don't need to be a master in C++ to start learning OpenGL. As a matter of fact, you don't even need to know C++. If you know a decent amount of C, you should be fine to start working with OpenGL. OpenGL is not a programming language, it is an API.
Is OpenGL for C or C++?
The OpenGL libraries are written in C and allows for many derivations in other languages, but in its core it remains a C-library.
So let's get started
1Install and Setup MSYS. Head over to this link https://www.msys2.org/ and download the mysy2 installer. 2Open MSYS2. 3Install Pacman in the MSYS2. 4Install MinGW package via CLI. 5Install Freeglut. 6Install Glew. 7Download Code Blocks. 8Set up the compiler in Code Blocks.

Learn OpenGL

An offline transcript of learnopengl.com

Joey de Vries

Copyright

2015 Joey de Vries

PUBLISHED BY ME:)

LEARNOPENGL.COMLicensed under the Creative Commons Attribution-NonCommercial 3.0 Unported License (the

"License"). You may not use this file except in compliance with the License. You may obtain a copy of the License athttp://creativecommons.org/licenses/by-nc/3.0. Un- less required by applicable law or agreed to in writing, software distributed under the License is distributed on an"AS IS"BASIS,WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Second printing, July 2015

1Introduction.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.1 Prerequisites

1.2 Structure

1.2.1 Boxes

1.2.2 Code

1.2.3 Color hints

1.2.4 OpenGL Function references

15 IGetting started

2OpenGL.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Core-profile vs Immediate mode

2.2 Extensions

2.3 State machine

2.4 Objects

2.5 Let"s get started

2.6 Additional resources

3Creating a window.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.1 GLFW

3.2 Building GLFW

3.2.1 CMake

3.2.2 Compilation

3.3 Our first project24

3.4 Linking

3.4.1 OpenGL library on Windows

3.4.2 OpenGL library on Linux

3.5 GLEW

3.5.1 Building and linking GLEW

3.6 Additional resources

4Hello Window.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.1 GLEW

4.2 Viewport

4.3 Ready your engines

4.4 One last thing

4.5 Input

4.6 Rendering

5Hello Triangle.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1 Vertex input

5.2 Vertex shader

5.3 Compiling a shader

5.4 Fragment shader

5.4.1 Shader program

5.5 Linking Vertex Attributes

5.5.1 Vertex Array Object

5.5.2 The triangle we"ve all been waiting for

5.6 Element Buffer Objects

5.7 Additional resources

5.8 Exercises

6Shaders.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

6.1 GLSL

6.2 Types

6.2.1 Vectors

6.3 Ins and outs

6.4 Uniforms

6.5 Our own shader class

6.6 Reading from file

6.7 Exercises

7Textures.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

7.1 Texture Wrapping

7.2 Texture Filtering

7.2.1 Mipmaps

7.3 Loading and creating textures68

7.4 SOIL

7.5 Generating a texture

7.6 Applying textures

7.7 Texture Units

7.8 Exercises

8Transformations.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

8.1 Vectors

8.2 Scalar vector operations

8.3 Vector negation

8.4 Addition and subtraction

8.5 Length

8.6 Vector-vector multiplication

8.6.1 Dot product

8.6.2 Cross product

8.7 Matrices

8.8 Addition and subtraction

8.9 Matrix-scalar products

8.10 Matrix-matrix multiplication

8.11 Matrix-Vector multiplication

8.12 Identity matrix

8.13 Scaling

8.14 Translation

8.15 Rotation

8.16 Combining matrices

8.17 In practice

8.18 GLM

8.19 Exercises

9Coordinate Systems.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

9.1 The global picture

9.2 Local space

9.3 World space

9.4 View space

9.5 Clip space

9.5.1 Orthographic projection

9.5.2 Perspective projection

9.6 Putting it all together

102

9.7 Going 3D

102

9.8 More 3D

106

9.8.1 Z-buffer

107

9.8.2 More cubes!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

9.9 Exercises

109

10Camera.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

10.1 Camera/View space

110

10.1.1 1. Camera position

111

10.1.2 2. Camera direction

111

10.1.3 3. Right axis

111

10.1.4 4. Up axis

111

10.2 Look At

112

10.3 Walk around

113

10.4 Movement speed

115

10.5 Look around

116

10.6 Euler angles

117

10.7 Mouse input

119

10.8 Zoom

121

10.9 Camera class

122

10.10 Exercises

123

11Review.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

11.1 Glossary

124 IILighting

12Colors.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

12.1 A lighting scene

129

13Basic Lighting.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

13.1 Ambient lighting

134

13.2 Diffuse lighting

135

13.3 Normal vectors

136

13.4 Calculating the diffuse color

137

13.5 One last thing

139

13.6 Specular Lighting

141

13.7 Exercises

145

14Materials.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

14.1 Setting materials

147

14.2 Light properties

149

14.3 Different light colors

151

14.4 Exercises

152

15Lighting maps.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

15.1 Diffuse maps

154

15.2 Specular maps

157

15.3 Sampling specular maps

158

15.4 Exercises

160

16Light casters.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

16.1 Directional Light

161

16.2 Point lights

164

16.3 Attenuation

165

16.3.1 Choosing the right values

166

16.3.2 Implementing attenuation

167

16.4 Spotlight

169

16.5 Flashlight

169

16.6 Smooth/Soft edges

172

16.7 Exercises

174

17Multiple lights.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

17.1 Directional light

176

17.2 Point light

177

17.3 Putting it all together

178

17.4 Exercises

181

18Review.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

18.1 Glossary

182 IIIModel Loading

19Assimp.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

19.1 A model loading library

186

19.2 Building Assimp

187

20Mesh.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

20.1 Initialization

190

20.2 Rendering

192

21Model.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

21.1 Importing a 3D model into OpenGL

195

21.1.1 Assimp to Mesh

197

21.1.2 Indices

199

21.1.3 Material

199

21.2 A large optimization200

21.3 No more containers!

202

21.4 Exercises

203 IVAdvanced OpenGL

22Depth testing.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

22.1 Depth test function

206

22.2 Depth value precision

209

22.3 Visualizing the depth buffer

210

22.4 Z-fighting

213

22.4.1 Prevent z-fighting

214

23Stencil testing.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

23.1 Stencil functions

218

23.2 Object outlining

219

24Blending.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

24.1 Discarding fragments

224

24.2 Blending

228

24.3 Rendering semi-transparent textures

231

24.4 Don"t break the order

233

25Face culling.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

25.1 Winding order

235

25.2 Face culling

237

25.3 Exercises

239

26Framebuffers.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

26.1 Creating a framebuffer

240

26.1.1 Texture attachments

242

26.1.2 Renderbuffer object attachments

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[PDF] offline learnopengl.pdf Since OpenGL is a graphics

Can you use C++ in OpenGL?

How much C++ is required for OpenGL?

Is OpenGL for C or C++?

So let's get started