sander/mandelbrot-nim
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cleanup, and minor performance improvements, but overal using doubles instead of floats in the fragment shader, rendering speed has gone down, but now you can zoom further

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Sander Hautvast 2020-10-23 23:06:34 +02:00
parent 62785bd02a
commit 69d47c6767
3 changed files with 280 additions and 274 deletions
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2
README.md
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@ -1,3 +1,5 @@
* my first nim project https://nim-lang.org/ * my first nim project https://nim-lang.org/
* also: my first opengl project, manually translated from c++ found in https://physicspython.wordpress.com/2020/02/16/visualizing-the-mandelbrot-set-using-opengl-part-1/ * also: my first opengl project, manually translated from c++ found in https://physicspython.wordpress.com/2020/02/16/visualizing-the-mandelbrot-set-using-opengl-part-1/
* works at least on my mac * works at least on my mac
* start with `nimble run`
* use arrow keys to navigate en ESC to quit

29
src/mandelbrot/mandelbrot.nim
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@ -1,25 +1,22 @@
import nimgl/[glfw, opengl] import nimgl/[glfw, opengl]
# keeps track of the GL program and the shaders, to interact with GL
var GLData: tuple[program, vertexShader, fragmentShader: uint32] var GLData: tuple[program, vertexShader, fragmentShader: uint32]
const const
WIN_WIDTH = 1000 WIN_WIDTH = 1000
WIN_HEIGHT = 800 WIN_HEIGHT = 800
# navigation parameters
var var
center_x = 0.0f center_x = 0.0f
center_y = 0.0f center_y = 0.0f
zoom:float64 = 1.0 zoom:float64 = 1.0
dx=0.0 dx = -0.001
dy = 0.0 dy = 0.0
zf=0.99 zf = 0.999
# handle keys
proc keyProc(window: GLFWWindow, key: int32, scancode: int32, action: int32, mods: int32): void {.cdecl.} = proc keyProc(window: GLFWWindow, key: int32, scancode: int32, action: int32, mods: int32): void {.cdecl.} =
# if key == GLFWKey.ESCAPE and action == GLFWPress:
# window.setWindowShouldClose(true)
# proc process_input(window: GLFWwindow)
if action == GLFWPress: if action == GLFWPress:
if key == GLFWKey.ESCAPE: if key == GLFWKey.ESCAPE:
window.setWindowShouldClose(true) window.setWindowShouldClose(true)
@ -32,7 +29,7 @@ proc keyProc(window: GLFWWindow, key: int32, scancode: int32, action: int32, mod
if key == GLFWKey.RIGHT: if key == GLFWKey.RIGHT:
dx += 0.001f; dx += 0.001f;
# prints an error message if necessary (if the shader won't)
proc logShaderCompilationFailure(shader: uint32, shader_path:string) = proc logShaderCompilationFailure(shader: uint32, shader_path:string) =
var logSize: int32 var logSize: int32
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, logSize.addr) glGetShaderiv(shader, GL_INFO_LOG_LENGTH, logSize.addr)
@ -46,6 +43,7 @@ proc logShaderCompilationFailure(shader: uint32, shader_path:string) =
dealloc(logStr) dealloc(logStr)
quit(-1) quit(-1)
# prints an error message if necessary
proc logProgramLinkingError() = proc logProgramLinkingError() =
var logSize: int32 var logSize: int32
glGetProgramiv(GLData.program, GL_INFO_LOG_LENGTH, logSize.addr) glGetProgramiv(GLData.program, GL_INFO_LOG_LENGTH, logSize.addr)
@ -57,6 +55,7 @@ proc logProgramLinkingError() =
dealloc(logStr) dealloc(logStr)
quit(-1) quit(-1)
# compiles a shader given a source file and a type
proc addShader(shader_path: string, shader_type: GLenum):uint32 = proc addShader(shader_path: string, shader_type: GLenum):uint32 =
let let
shadercode = readFile(shader_path) shadercode = readFile(shader_path)
@ -72,6 +71,7 @@ proc addShader(shader_path: string, shader_type: GLenum):uint32 =
return shader return shader
# loads program and shaders
proc initShaders(vertex_shader_path: string, fragment_shader_path: string) = proc initShaders(vertex_shader_path: string, fragment_shader_path: string) =
GLData.program = glCreateProgram() GLData.program = glCreateProgram()
GLData.vertexShader = addShader(vertex_shader_path, GL_VERTEX_SHADER) GLData.vertexShader = addShader(vertex_shader_path, GL_VERTEX_SHADER)
@ -83,6 +83,7 @@ proc initShaders(vertex_shader_path: string, fragment_shader_path: string) =
if success == 0: logProgramLinkingError() if success == 0: logProgramLinkingError()
# pass data to the fragment shader
proc set_float(name: string, value:float) = proc set_float(name: string, value:float) =
glUniform1f(glGetUniformLocation(GLData.program, name.cstring()), value.cfloat()); glUniform1f(glGetUniformLocation(GLData.program, name.cstring()), value.cfloat());
@ -107,6 +108,7 @@ proc main() =
assert glInit() assert glInit()
# two triangles that together make up the entire window
var vertices = @[ var vertices = @[
-1.0f, -1.0f, -0.0f, -1.0f, -1.0f, -0.0f,
1.0f, 1.0f, -0.0f, 1.0f, 1.0f, -0.0f,
@ -120,6 +122,7 @@ proc main() =
# | .' | # | .' |
# 0'---3 # 0'---3
# load the data into GL
var mesh: tuple[vao,vbo,ebo: uint32] var mesh: tuple[vao,vbo,ebo: uint32]
glGenVertexArrays(1, mesh.vao.addr) glGenVertexArrays(1, mesh.vao.addr)
@ -141,11 +144,13 @@ proc main() =
glBindVertexArray(mesh.vao) glBindVertexArray(mesh.vao)
initShaders("src/mandelbrot/shader.vert", "src/mandelbrot/shader.frag") initShaders("src/mandelbrot/shader.vert", "src/mandelbrot/shader.frag")
while not window.windowShouldClose:
glClearColor(0.2, 0.2, 0.2, 0.5)
glUseProgram(GLData.program) glUseProgram(GLData.program)
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT) glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
glBindVertexArray(mesh.vao)
# main loop
while not window.windowShouldClose:
# update zoom params
zoom *= zf zoom *= zf
if zf < 0.0: zf = 0.0 if zf < 0.0: zf = 0.0
center_y += dy * zoom center_y += dy * zoom
@ -155,11 +160,11 @@ proc main() =
if center_x > 1.0f: center_x = 1.0f if center_x > 1.0f: center_x = 1.0f
if center_x < -1.0f: center_x = -1.0f if center_x < -1.0f: center_x = -1.0f
# pass the data to the shader
set_float("zoom", zoom) set_float("zoom", zoom)
set_float("center_x", center_x) set_float("center_x", center_x)
set_float("center_y", center_y) set_float("center_y", center_y)
glBindVertexArray(mesh.vao)
glDrawElements(GL_TRIANGLES, indices.len.cint, GL_UNSIGNED_INT, nil) glDrawElements(GL_TRIANGLES, indices.len.cint, GL_UNSIGNED_INT, nil)
window.swapBuffers() window.swapBuffers()
glfwPollEvents() glfwPollEvents()

513
src/mandelbrot/shader.frag
View file

@ -2,7 +2,6 @@
in vec4 gl_FragCoord; in vec4 gl_FragCoord;
out vec4 fragColor; out vec4 fragColor;
//out float gl_FragDepth;
uniform float center_x; uniform float center_x;
uniform float center_y; uniform float center_y;
@ -12,267 +11,267 @@ uniform float zoom;
const vec3 colors[256] = vec3[256]( const vec3 colors[256] = vec3[256](
vec3(0.0,0.0,0.0), vec3(0.0,0.0,0.0),
vec3(128.0,0.0,0.0), vec3(0.5,0.0,0.0),
vec3(0.0,128.0,0.0), vec3(0.0,0.5,0.0),
vec3(128.0,128.0,0.0), vec3(0.5,0.5,0.0),
vec3(0.0,0.0,128.0), vec3(0.0,0.0,0.5),
vec3(128.0,0.0,128.0), vec3(0.5,0.0,0.5),
vec3(0.0,128.0,128.0), vec3(0.0,0.5,0.5),
vec3(192.0,192.0,192.0), vec3(0.75,0.75,0.75),
vec3(128.0,128.0,128.0), vec3(0.5,0.5,0.5),
vec3(255.0,0.0,0.0), vec3(0.99609375,0.0,0.0),
vec3(0.0,255.0,0.0), vec3(0.0,0.99609375,0.0),
vec3(255.0,255.0,0.0), vec3(0.99609375,0.99609375,0.0),
vec3(0.0,0.0,255.0), vec3(0.0,0.0,0.99609375),
vec3(255.0,0.0,255.0), vec3(0.99609375,0.0,0.99609375),
vec3(0.0,255.0,255.0), vec3(0.0,0.99609375,0.99609375),
vec3(255.0,255.0,255.0), vec3(0.99609375,0.99609375,0.99609375),
vec3(0.0,0.0,0.0), vec3(0.0,0.0,0.0),
vec3(0.0,0.0,95.0), vec3(0.0,0.0,0.37109375),
vec3(0.0,0.0,135.0), vec3(0.0,0.0,0.52734375),
vec3(0.0,0.0,175.0), vec3(0.0,0.0,0.68359375),
vec3(0.0,0.0,215.0), vec3(0.0,0.0,0.83984375),
vec3(0.0,0.0,255.0), vec3(0.0,0.0,0.99609375),
vec3(0.0,95.0,0.0), vec3(0.0,0.37109375,0.0),
vec3(0.0,95.0,95.0), vec3(0.0,0.37109375,0.37109375),
vec3(0.0,95.0,135.0), vec3(0.0,0.37109375,0.52734375),
vec3(0.0,95.0,175.0), vec3(0.0,0.37109375,0.68359375),
vec3(0.0,95.0,215.0), vec3(0.0,0.37109375,0.83984375),
vec3(0.0,95.0,255.0), vec3(0.0,0.37109375,0.99609375),
vec3(0.0,135.0,0.0), vec3(0.0,0.52734375,0.0),
vec3(0.0,135.0,95.0), vec3(0.0,0.52734375,0.37109375),
vec3(0.0,135.0,135.0), vec3(0.0,0.52734375,0.52734375),
vec3(0.0,135.0,175.0), vec3(0.0,0.52734375,0.68359375),
vec3(0.0,135.0,215.0), vec3(0.0,0.52734375,0.83984375),
vec3(0.0,135.0,255.0), vec3(0.0,0.52734375,0.99609375),
vec3(0.0,175.0,0.0), vec3(0.0,0.68359375,0.0),
vec3(0.0,175.0,95.0), vec3(0.0,0.68359375,0.37109375),
vec3(0.0,175.0,135.0), vec3(0.0,0.68359375,0.52734375),
vec3(0.0,175.0,175.0), vec3(0.0,0.68359375,0.68359375),
vec3(0.0,175.0,215.0), vec3(0.0,0.68359375,0.83984375),
vec3(0.0,175.0,255.0), vec3(0.0,0.68359375,0.99609375),
vec3(0.0,215.0,0.0), vec3(0.0,0.83984375,0.0),
vec3(0.0,215.0,95.0), vec3(0.0,0.83984375,0.37109375),
vec3(0.0,215.0,135.0), vec3(0.0,0.83984375,0.52734375),
vec3(0.0,215.0,175.0), vec3(0.0,0.83984375,0.68359375),
vec3(0.0,215.0,215.0), vec3(0.0,0.83984375,0.83984375),
vec3(0.0,215.0,255.0), vec3(0.0,0.83984375,0.99609375),
vec3(0.0,255.0,0.0), vec3(0.0,0.99609375,0.0),
vec3(0.0,255.0,95.0), vec3(0.0,0.99609375,0.37109375),
vec3(0.0,255.0,135.0), vec3(0.0,0.99609375,0.52734375),
vec3(0.0,255.0,175.0), vec3(0.0,0.99609375,0.68359375),
vec3(0.0,255.0,215.0), vec3(0.0,0.99609375,0.83984375),
vec3(0.0,255.0,255.0), vec3(0.0,0.99609375,0.99609375),
vec3(95.0,0.0,0.0), vec3(0.37109375,0.0,0.0),
vec3(95.0,0.0,95.0), vec3(0.37109375,0.0,0.37109375),
vec3(95.0,0.0,135.0), vec3(0.37109375,0.0,0.52734375),
vec3(95.0,0.0,175.0), vec3(0.37109375,0.0,0.68359375),
vec3(95.0,0.0,215.0), vec3(0.37109375,0.0,0.83984375),
vec3(95.0,0.0,255.0), vec3(0.37109375,0.0,0.99609375),
vec3(95.0,95.0,0.0), vec3(0.37109375,0.37109375,0.0),
vec3(95.0,95.0,95.0), vec3(0.37109375,0.37109375,0.37109375),
vec3(95.0,95.0,135.0), vec3(0.37109375,0.37109375,0.52734375),
vec3(95.0,95.0,175.0), vec3(0.37109375,0.37109375,0.68359375),
vec3(95.0,95.0,215.0), vec3(0.37109375,0.37109375,0.83984375),
vec3(95.0,95.0,255.0), vec3(0.37109375,0.37109375,0.99609375),
vec3(95.0,135.0,0.0), vec3(0.37109375,0.52734375,0.0),
vec3(95.0,135.0,95.0), vec3(0.37109375,0.52734375,0.37109375),
vec3(95.0,135.0,135.0), vec3(0.37109375,0.52734375,0.52734375),
vec3(95.0,135.0,175.0), vec3(0.37109375,0.52734375,0.68359375),
vec3(95.0,135.0,215.0), vec3(0.37109375,0.52734375,0.83984375),
vec3(95.0,135.0,255.0), vec3(0.37109375,0.52734375,0.99609375),
vec3(95.0,175.0,0.0), vec3(0.37109375,0.68359375,0.0),
vec3(95.0,175.0,95.0), vec3(0.37109375,0.68359375,0.37109375),
vec3(95.0,175.0,135.0), vec3(0.37109375,0.68359375,0.52734375),
vec3(95.0,175.0,175.0), vec3(0.37109375,0.68359375,0.68359375),
vec3(95.0,175.0,215.0), vec3(0.37109375,0.68359375,0.83984375),
vec3(95.0,175.0,255.0), vec3(0.37109375,0.68359375,0.99609375),
vec3(95.0,215.0,0.0), vec3(0.37109375,0.83984375,0.0),
vec3(95.0,215.0,95.0), vec3(0.37109375,0.83984375,0.37109375),
vec3(95.0,215.0,135.0), vec3(0.37109375,0.83984375,0.52734375),
vec3(95.0,215.0,175.0), vec3(0.37109375,0.83984375,0.68359375),
vec3(95.0,215.0,215.0), vec3(0.37109375,0.83984375,0.83984375),
vec3(95.0,215.0,255.0), vec3(0.37109375,0.83984375,0.99609375),
vec3(95.0,255.0,0.0), vec3(0.37109375,0.99609375,0.0),
vec3(95.0,255.0,95.0), vec3(0.37109375,0.99609375,0.37109375),
vec3(95.0,255.0,135.0), vec3(0.37109375,0.99609375,0.52734375),
vec3(95.0,255.0,175.0), vec3(0.37109375,0.99609375,0.68359375),
vec3(95.0,255.0,215.0), vec3(0.37109375,0.99609375,0.83984375),
vec3(95.0,255.0,255.0), vec3(0.37109375,0.99609375,0.99609375),
vec3(135.0,0.0,0.0), vec3(0.52734375,0.0,0.0),
vec3(135.0,0.0,95.0), vec3(0.52734375,0.0,0.37109375),
vec3(135.0,0.0,135.0), vec3(0.52734375,0.0,0.52734375),
vec3(135.0,0.0,175.0), vec3(0.52734375,0.0,0.68359375),
vec3(135.0,0.0,215.0), vec3(0.52734375,0.0,0.83984375),
vec3(135.0,0.0,255.0), vec3(0.52734375,0.0,0.99609375),
vec3(135.0,95.0,0.0), vec3(0.52734375,0.37109375,0.0),
vec3(135.0,95.0,95.0), vec3(0.52734375,0.37109375,0.37109375),
vec3(135.0,95.0,135.0), vec3(0.52734375,0.37109375,0.52734375),
vec3(135.0,95.0,175.0), vec3(0.52734375,0.37109375,0.68359375),
vec3(135.0,95.0,215.0), vec3(0.52734375,0.37109375,0.83984375),
vec3(135.0,95.0,255.0), vec3(0.52734375,0.37109375,0.99609375),
vec3(135.0,135.0,0.0), vec3(0.52734375,0.52734375,0.0),
vec3(135.0,135.0,95.0), vec3(0.52734375,0.52734375,0.37109375),
vec3(135.0,135.0,135.0), vec3(0.52734375,0.52734375,0.52734375),
vec3(135.0,135.0,175.0), vec3(0.52734375,0.52734375,0.68359375),
vec3(135.0,135.0,215.0), vec3(0.52734375,0.52734375,0.83984375),
vec3(135.0,135.0,255.0), vec3(0.52734375,0.52734375,0.99609375),
vec3(135.0,175.0,0.0), vec3(0.52734375,0.68359375,0.0),
vec3(135.0,175.0,95.0), vec3(0.52734375,0.68359375,0.37109375),
vec3(135.0,175.0,135.0), vec3(0.52734375,0.68359375,0.52734375),
vec3(135.0,175.0,175.0), vec3(0.52734375,0.68359375,0.68359375),
vec3(135.0,175.0,215.0), vec3(0.52734375,0.68359375,0.83984375),
vec3(135.0,175.0,255.0), vec3(0.52734375,0.68359375,0.99609375),
vec3(135.0,215.0,0.0), vec3(0.52734375,0.83984375,0.0),
vec3(135.0,215.0,95.0), vec3(0.52734375,0.83984375,0.37109375),
vec3(135.0,215.0,135.0), vec3(0.52734375,0.83984375,0.52734375),
vec3(135.0,215.0,175.0), vec3(0.52734375,0.83984375,0.68359375),
vec3(135.0,215.0,215.0), vec3(0.52734375,0.83984375,0.83984375),
vec3(135.0,215.0,255.0), vec3(0.52734375,0.83984375,0.99609375),
vec3(135.0,255.0,0.0), vec3(0.52734375,0.99609375,0.0),
vec3(135.0,255.0,95.0), vec3(0.52734375,0.99609375,0.37109375),
vec3(135.0,255.0,135.0), vec3(0.52734375,0.99609375,0.52734375),
vec3(135.0,255.0,175.0), vec3(0.52734375,0.99609375,0.68359375),
vec3(135.0,255.0,215.0), vec3(0.52734375,0.99609375,0.83984375),
vec3(135.0,255.0,255.0), vec3(0.52734375,0.99609375,0.99609375),
vec3(175.0,0.0,0.0), vec3(0.68359375,0.0,0.0),
vec3(175.0,0.0,95.0), vec3(0.68359375,0.0,0.37109375),
vec3(175.0,0.0,135.0), vec3(0.68359375,0.0,0.52734375),
vec3(175.0,0.0,175.0), vec3(0.68359375,0.0,0.68359375),
vec3(175.0,0.0,215.0), vec3(0.68359375,0.0,0.83984375),
vec3(175.0,0.0,255.0), vec3(0.68359375,0.0,0.99609375),
vec3(175.0,95.0,0.0), vec3(0.68359375,0.37109375,0.0),
vec3(175.0,95.0,95.0), vec3(0.68359375,0.37109375,0.37109375),
vec3(175.0,95.0,135.0), vec3(0.68359375,0.37109375,0.52734375),
vec3(175.0,95.0,175.0), vec3(0.68359375,0.37109375,0.68359375),
vec3(175.0,95.0,215.0), vec3(0.68359375,0.37109375,0.83984375),
vec3(175.0,95.0,255.0), vec3(0.68359375,0.37109375,0.99609375),
vec3(175.0,135.0,0.0), vec3(0.68359375,0.52734375,0.0),
vec3(175.0,135.0,95.0), vec3(0.68359375,0.52734375,0.37109375),
vec3(175.0,135.0,135.0), vec3(0.68359375,0.52734375,0.52734375),
vec3(175.0,135.0,175.0), vec3(0.68359375,0.52734375,0.68359375),
vec3(175.0,135.0,215.0), vec3(0.68359375,0.52734375,0.83984375),
vec3(175.0,135.0,255.0), vec3(0.68359375,0.52734375,0.99609375),
vec3(175.0,175.0,0.0), vec3(0.68359375,0.68359375,0.0),
vec3(175.0,175.0,95.0), vec3(0.68359375,0.68359375,0.37109375),
vec3(175.0,175.0,135.0), vec3(0.68359375,0.68359375,0.52734375),
vec3(175.0,175.0,175.0), vec3(0.68359375,0.68359375,0.68359375),
vec3(175.0,175.0,215.0), vec3(0.68359375,0.68359375,0.83984375),
vec3(175.0,175.0,255.0), vec3(0.68359375,0.68359375,0.99609375),
vec3(175.0,215.0,0.0), vec3(0.68359375,0.83984375,0.0),
vec3(175.0,215.0,95.0), vec3(0.68359375,0.83984375,0.37109375),
vec3(175.0,215.0,135.0), vec3(0.68359375,0.83984375,0.52734375),
vec3(175.0,215.0,175.0), vec3(0.68359375,0.83984375,0.68359375),
vec3(175.0,215.0,215.0), vec3(0.68359375,0.83984375,0.83984375),
vec3(175.0,215.0,255.0), vec3(0.68359375,0.83984375,0.99609375),
vec3(175.0,255.0,0.0), vec3(0.68359375,0.99609375,0.0),
vec3(175.0,255.0,95.0), vec3(0.68359375,0.99609375,0.37109375),
vec3(175.0,255.0,135.0), vec3(0.68359375,0.99609375,0.52734375),
vec3(175.0,255.0,175.0), vec3(0.68359375,0.99609375,0.68359375),
vec3(175.0,255.0,215.0), vec3(0.68359375,0.99609375,0.83984375),
vec3(175.0,255.0,255.0), vec3(0.68359375,0.99609375,0.99609375),
vec3(215.0,0.0,0.0), vec3(0.83984375,0.0,0.0),
vec3(215.0,0.0,95.0), vec3(0.83984375,0.0,0.37109375),
vec3(215.0,0.0,135.0), vec3(0.83984375,0.0,0.52734375),
vec3(215.0,0.0,175.0), vec3(0.83984375,0.0,0.68359375),
vec3(215.0,0.0,215.0), vec3(0.83984375,0.0,0.83984375),
vec3(215.0,0.0,255.0), vec3(0.83984375,0.0,0.99609375),
vec3(215.0,95.0,0.0), vec3(0.83984375,0.37109375,0.0),
vec3(215.0,95.0,95.0), vec3(0.83984375,0.37109375,0.37109375),
vec3(215.0,95.0,135.0), vec3(0.83984375,0.37109375,0.52734375),
vec3(215.0,95.0,175.0), vec3(0.83984375,0.37109375,0.68359375),
vec3(215.0,95.0,215.0), vec3(0.83984375,0.37109375,0.83984375),
vec3(215.0,95.0,255.0), vec3(0.83984375,0.37109375,0.99609375),
vec3(215.0,135.0,0.0), vec3(0.83984375,0.52734375,0.0),
vec3(215.0,135.0,95.0), vec3(0.83984375,0.52734375,0.37109375),
vec3(215.0,135.0,135.0), vec3(0.83984375,0.52734375,0.52734375),
vec3(215.0,135.0,175.0), vec3(0.83984375,0.52734375,0.68359375),
vec3(215.0,135.0,215.0), vec3(0.83984375,0.52734375,0.83984375),
vec3(215.0,135.0,255.0), vec3(0.83984375,0.52734375,0.99609375),
vec3(215.0,175.0,0.0), vec3(0.83984375,0.68359375,0.0),
vec3(215.0,175.0,95.0), vec3(0.83984375,0.68359375,0.37109375),
vec3(215.0,175.0,135.0), vec3(0.83984375,0.68359375,0.52734375),
vec3(215.0,175.0,175.0), vec3(0.83984375,0.68359375,0.68359375),
vec3(215.0,175.0,215.0), vec3(0.83984375,0.68359375,0.83984375),
vec3(215.0,175.0,255.0), vec3(0.83984375,0.68359375,0.99609375),
vec3(215.0,215.0,0.0), vec3(0.83984375,0.83984375,0.0),
vec3(215.0,215.0,95.0), vec3(0.83984375,0.83984375,0.37109375),
vec3(215.0,215.0,135.0), vec3(0.83984375,0.83984375,0.52734375),
vec3(215.0,215.0,175.0), vec3(0.83984375,0.83984375,0.68359375),
vec3(215.0,215.0,215.0), vec3(0.83984375,0.83984375,0.83984375),
vec3(215.0,215.0,255.0), vec3(0.83984375,0.83984375,0.99609375),
vec3(215.0,255.0,0.0), vec3(0.83984375,0.99609375,0.0),
vec3(215.0,255.0,95.0), vec3(0.83984375,0.99609375,0.37109375),
vec3(215.0,255.0,135.0), vec3(0.83984375,0.99609375,0.52734375),
vec3(215.0,255.0,175.0), vec3(0.83984375,0.99609375,0.68359375),
vec3(215.0,255.0,215.0), vec3(0.83984375,0.99609375,0.83984375),
vec3(215.0,255.0,255.0), vec3(0.83984375,0.99609375,0.99609375),
vec3(255.0,0.0,0.0), vec3(0.99609375,0.0,0.0),
vec3(255.0,0.0,95.0), vec3(0.99609375,0.0,0.37109375),
vec3(255.0,0.0,135.0), vec3(0.99609375,0.0,0.52734375),
vec3(255.0,0.0,175.0), vec3(0.99609375,0.0,0.68359375),
vec3(255.0,0.0,215.0), vec3(0.99609375,0.0,0.83984375),
vec3(255.0,0.0,255.0), vec3(0.99609375,0.0,0.99609375),
vec3(255.0,95.0,0.0), vec3(0.99609375,0.37109375,0.0),
vec3(255.0,95.0,95.0), vec3(0.99609375,0.37109375,0.37109375),
vec3(255.0,95.0,135.0), vec3(0.99609375,0.37109375,0.52734375),
vec3(255.0,95.0,175.0), vec3(0.99609375,0.37109375,0.68359375),
vec3(255.0,95.0,215.0), vec3(0.99609375,0.37109375,0.83984375),
vec3(255.0,95.0,255.0), vec3(0.99609375,0.37109375,0.99609375),
vec3(255.0,135.0,0.0), vec3(0.99609375,0.52734375,0.0),
vec3(255.0,135.0,95.0), vec3(0.99609375,0.52734375,0.37109375),
vec3(255.0,135.0,135.0), vec3(0.99609375,0.52734375,0.52734375),
vec3(255.0,135.0,175.0), vec3(0.99609375,0.52734375,0.68359375),
vec3(255.0,135.0,215.0), vec3(0.99609375,0.52734375,0.83984375),
vec3(255.0,135.0,255.0), vec3(0.99609375,0.52734375,0.99609375),
vec3(255.0,175.0,0.0), vec3(0.99609375,0.68359375,0.0),
vec3(255.0,175.0,95.0), vec3(0.99609375,0.68359375,0.37109375),
vec3(255.0,175.0,135.0), vec3(0.99609375,0.68359375,0.52734375),
vec3(255.0,175.0,175.0), vec3(0.99609375,0.68359375,0.68359375),
vec3(255.0,175.0,215.0), vec3(0.99609375,0.68359375,0.83984375),
vec3(255.0,175.0,255.0), vec3(0.99609375,0.68359375,0.99609375),
vec3(255.0,215.0,0.0), vec3(0.99609375,0.83984375,0.0),
vec3(255.0,215.0,95.0), vec3(0.99609375,0.83984375,0.37109375),
vec3(255.0,215.0,135.0), vec3(0.99609375,0.83984375,0.52734375),
vec3(255.0,215.0,175.0), vec3(0.99609375,0.83984375,0.68359375),
vec3(255.0,215.0,215.0), vec3(0.99609375,0.83984375,0.83984375),
vec3(255.0,215.0,255.0), vec3(0.99609375,0.83984375,0.99609375),
vec3(255.0,255.0,0.0), vec3(0.99609375,0.99609375,0.0),
vec3(255.0,255.0,95.0), vec3(0.99609375,0.99609375,0.37109375),
vec3(255.0,255.0,135.0), vec3(0.99609375,0.99609375,0.52734375),
vec3(255.0,255.0,175.0), vec3(0.99609375,0.99609375,0.68359375),
vec3(255.0,255.0,215.0), vec3(0.99609375,0.99609375,0.83984375),
vec3(255.0,255.0,255.0), vec3(0.99609375,0.99609375,0.99609375),
vec3(8.0,8.0,8.0), vec3(0.03125,0.03125,0.03125),
vec3(18.0,18.0,18.0), vec3(0.0703125,0.0703125,0.0703125),
vec3(28.0,28.0,28.0), vec3(0.109375,0.109375,0.109375),
vec3(38.0,38.0,38.0), vec3(0.1484375,0.1484375,0.1484375),
vec3(48.0,48.0,48.0), vec3(0.1875,0.1875,0.1875),
vec3(58.0,58.0,58.0), vec3(0.2265625,0.2265625,0.2265625),
vec3(68.0,68.0,68.0), vec3(0.265625,0.265625,0.265625),
vec3(78.0,78.0,78.0), vec3(0.3046875,0.3046875,0.3046875),
vec3(88.0,88.0,88.0), vec3(0.34375,0.34375,0.34375),
vec3(98.0,98.0,98.0), vec3(0.3828125,0.3828125,0.3828125),
vec3(108.0,108.0,108.0), vec3(0.421875,0.421875,0.421875),
vec3(118.0,118.0,118.0), vec3(0.4609375,0.4609375,0.4609375),
vec3(128.0,128.0,128.0), vec3(0.5,0.5,0.5),
vec3(138.0,138.0,138.0), vec3(0.5390625,0.5390625,0.5390625),
vec3(148.0,148.0,148.0), vec3(0.578125,0.578125,0.578125),
vec3(158.0,158.0,158.0), vec3(0.6171875,0.6171875,0.6171875),
vec3(168.0,168.0,168.0), vec3(0.65625,0.65625,0.65625),
vec3(178.0,178.0,178.0), vec3(0.6953125,0.6953125,0.6953125),
vec3(188.0,188.0,188.0), vec3(0.734375,0.734375,0.734375),
vec3(198.0,198.0,198.0), vec3(0.7734375,0.7734375,0.7734375),
vec3(208.0,208.0,208.0), vec3(0.8125,0.8125,0.8125),
vec3(218.0,218.0,218.0), vec3(0.8515625,0.8515625,0.8515625),
vec3(228.0,228.0,228.0), vec3(0.890625,0.890625,0.890625),
vec3(238.0,238.0,238.0) vec3(0.9296875,0.9296875,0.9296875)
); );
int get_iterations() int get_iterations()
{ {
double real = ((gl_FragCoord.x / 1000.0f - 1.2f) * zoom + center_x) * 1.5f; double real = ((gl_FragCoord.x / 1000.0f - 1.2f) * zoom + center_x) * 1.5f;
double imag = ((gl_FragCoord.y / 800.0f - 0.7f) * zoom + center_y) * 1.5f; double imag = ((gl_FragCoord.y / 800.0f - 0.9f) * zoom + center_y) * 1.5f;
int iterations = 0; int iterations = 0;
@ -306,7 +305,7 @@ vec4 return_color()
} }
int colorIndex = int((float(iter)/float(MAX_ITERATIONS))*256); int colorIndex = int((float(iter)/float(MAX_ITERATIONS))*256);
vec3 color = colors[colorIndex]; vec3 color = colors[colorIndex];
return vec4(color.x/256, color.y/256, color.z/256, 1.0); return vec4(color.x, color.y, color.z, 1.0);
} }