College Study/GLSL26 [GLSL] Gain http://www.iquilezles.org/www/articles/functions/functions.htm Inigo Quilez Articles on computer graphics, math and art iquilezles.org Remapping the unit interval into the unit interval by expanding the sides and compressing the center, and keeping 1/2 mapped to 1/2, that can be done with the gain() function. This was a common function in RSL tutorials (the Renderman Shading Language). k=1 is th.. 2022. 1. 5. [GLSL] Shaping Functions https://thebookofshaders.com/05/ The Book of Shaders Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. thebookofshaders.com Here is the code I met previously. #ifdef GL_ES precision mediump float; #endif uniform vec2 u_resolution; uniform vec2 u_mouse; uniform float u_time; // Plot a line on Y using a value between 0.0-1.0 float plot(vec2 st, float pct){ re.. 2022. 1. 5. [GLSL] Smoothstep https://thebookofshaders.com/05/ The Book of Shaders Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. thebookofshaders.com #ifdef GL_ES precision mediump float; #endif uniform vec2 u_resolution; uniform vec2 u_mouse; uniform float u_time; void main() { vec2 st = gl_FragCoord.xy/u_resolution; float y = st.x; vec3 color = vec3(y); gl_FragColor = vec4(color,1.. 2022. 1. 5. [GLSL] Fragment Coordinate (gl_FragCoord) https://thebookofshaders.com/03/ The Book of Shaders Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. thebookofshaders.com In the same way GLSL gives us a default output, vec4 gl_FragColor, it also gives us a default input, vec4 gl_FragCoord, which holds the screen coordinates of the pixel or screen fragment that the active thread is working on. With vec4 .. 2022. 1. 5. [GLSL] Uniform https://thebookofshaders.com/03/ The Book of Shaders Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. thebookofshaders.com #ifdef GL_ES precision mediump float; #endif uniform vec2 u_resolution; // Canvas size (width,height) uniform vec2 u_mouse; // mouse position in screen pixels uniform float u_time; // Time in seconds since load void main() { gl_FragCol.. 2022. 1. 5. [GLSL] Hello World https://thebookofshaders.com/02/ The Book of Shaders Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. thebookofshaders.com #ifdef GL_ES precision mediump float; #endif void main() { gl_FragColor = vec4(1.0,0.0,1.0,1.0); } 1. Shader Language is C-flavored language. 2. The final pixel color is assigned to the reserved global variable gl_FragColor. 3. Shader .. 2022. 1. 5. [GLSL] What is a shader? https://thebookofshaders.com/01/ The Book of Shaders Gentle step-by-step guide through the abstract and complex universe of Fragment Shaders. thebookofshaders.com Shaders are also a set of instructions, but the instructions are executed all at once for every single pixel on the screen. That means the code you write has to behave differently depending on the position of the pixel on the screen. L.. 2022. 1. 5. [GLSL] Let's Dive in to the Shader! I wanted to study graphics languages (especially shaders), but I was worried about which language to choose between OpenGL and DirectX. I am currently using a MacBook and would like to use an online tutorial which name is "The Book of Shaders". Furthermore, in fact, GLSL and HLSL are similar to each other except for a few syntax... so I finally decided to study OpenGL shaders. As I mentioned, I .. 2022. 1. 5. 이전 1 2 3 다음
