laurelkeys

//
// Quadric : dot(vec4(x, y, z, 1.0), Q * vec4(x, y, z, 1.0)) = 0
//
// ax2 + 2bxy + 2cxz + 2dx + ey2 + 2fyz + 2gy +hz2 + 2iz + j = 0
//
// Q = mat4(vec4(a, b, c, d), vec4(b, e, f, g), vec4(c, f, h, i), vec4(d, g, i, j))
//

float iQuadric(in vec3 ro, in vec3 rd, in vec2 distBound, inout vec3 normal,

laurelkeys

/*****************************************************************************
 *** IP Addresses, structs, and Data Munging *********************************
 ============================================================================*/

// See https://man7.org/linux/man-pages/man3/getaddrinfo.3.html
//  |
//  |    struct addrinfo {
//  |        int                ai_flags;       // AI_PASSIVE, AI_CANONNAME, etc.
//  |        int                ai_family;      // AF_INET, AF_INET6, AF_UNSPEC
//  |        int                ai_socktype;    // SOCK_STREAM, SOCK_DGRAM

laurelkeys

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn  ; Enable warnings to assist with detecting common errors.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir%  ; Ensures a consistent starting directory.

; Disable CapsLock
SetCapsLockState, AlwaysOff

/* Base layer
 * ,----------------------------------------------------------------------------------------.

laurelkeys

// Bilinear interpolation.
static Color3f blerp(
    const Image& image,
    const std::size_t x0, const std::size_t y0,
    const std::size_t x1, const std::size_t y1,
    const float fx, const float fy
) {
    // Compute weights:
    const float wx1 = fx - x0;
    const float wy1 = fy - y0;

laurelkeys

Absolute tolerance comparison of x and :

// Fails when x and y become largey
if (abs(x - y) <= EPSILON)
    // ...

Relative tolerance comparison of x and y:

// Fails when x and y become small

laurelkeys

New Post-Processing Stages Project Proposal

Contact Information

Tiago Chaves

• Email: tiagoloureirochaves@gmail.com
• GitHub: laurelkeys
• Discord: laurelkeys#6751

laurelkeys

// Visualizing selected colors from one of Iñigo Quilez's color palettes
// See https://www.shadertoy.com/view/ll2GD3
//     https://www.shadertoy.com/view/3lBXR3


//#define THREAD_INDEX 0.0
#define N_OF_THREADS 4.0


// 0 = iq's cosine palette

laurelkeys

# connect to airsim

player_start_UE4 = client.getHomeGeoPoint()  # obs.: this can be changed by OriginGeopoint in settings.json
ground_offset_NED = client.simGetVehiclePose().position  # assumes the drone is at PlayerStart
assert ground_offset_NED.x_val == ground_offset_NED.y_val == 0

def to_NED(coords_UE4, ground_offset_NED=ground_offset_NED, player_start_UE4=player_start_UE4):
    ''' Converts Unreal coordinates to NED system.
        Assumes PlayerStart is at (0, 0, 0) in AirSim's local NED coordinate system. '''
    coords_NED = coords_UE4 - player_start_UE4  # Unreal uses cm and +z aiming up

laurelkeys

import numpy as np

def encode(bgr_img, message, bit_plane):
    height, width, depth = bgr_img.shape
    max_bytes = height * width * depth // 8
    max_bits = max_bytes * 8 # we can only store whole byte words

    if len(message) < max_bytes:
        message += b'\0' # mark the end of the message

laurelkeys

import numpy as np
def each_count(array):
	count = np.bincount(array)
	nonzero_count = np.nonzero(count)[0]
	return zip(nonzero_count, count[nonzero_count])