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Rendering
Fall 2016 - 591/691
SLIDE 2 Who am I?
Allan Rocha Email: rocha.allanc@gmail.com or acarocha@ucalgary.ca Subject: [CPSC591] Tutorial Page: http://pages.cpsc.ucalgary.ca/~acarocha/CPSC591/index.html Topics of Interest:
- Real-time Rendering
- Non-photorealistic Rendering
- Scientific Visualization
- Illustrative Visualization
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What to render and how to render?
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Old OpenGL vs New OpenGL References: OpenGL Insights - Chapter One Opengl Super Bible Red Book OpenGL Anton's OpenGL 4 Tutorials
SLIDE 12 OpenGL insights
○ Teaching Computer Graphics Starting with Shader-Based OpenGL
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Hello World in OpenGL: Old Style
SLIDE 14 Hello World in OpenGL: Old Style
- Major issues with this code
○ Use of immediate mode ■ callings between CPU vs GPU ○ Reliance on the fixed-function pipeline ■ complex geometry == slow rendering, why??? ○ Use of default values for state variables ■ multitude of state variables
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Simplified OpenGL pipeline - OLD vs NEW
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Simplified OpenGL pipeline - OLD vs NEW
SLIDE 17 Programmable pipeline
- GLSL - OpenGL Shading Language
○ Glew library - http://glew.sourceforge.net/ ○ Similar to C/C++
SLIDE 18 Hello World: New Style
○ Setup shaders ■ Init, compile, link ○ Sends data to the CPU to GPU ■ Immediate-mode programing (VAO and VBO) ○ Render the data on the GPU
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Hello World: New Style
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Hello World: New Style
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Hello World: New Style
