void draw(unsigned char *image) { for (int y = 0; y < HEIGHT; y++) { for (int x = 0; x < WIDTH; x++) { if (someCondition) { int red = x * 256 / WIDTH; int green = 255; int blue = y * 256 / HEIGHT; image[0] = (unsigned char)blue; image[1] = (unsigned… Read More incrementing unsigned char *image
I have write in a unsigned char *, two int and send it via a socket in C. How can i retrieve those values from the receiver side. Code: unsigned char * request = malloc (8 * sizeof(unsigned char)); int index = htonl(rand() % 1000); int size = htonl(key_size); memcpy(request, &ind,4); memcpy(request+4, &size,4); >Solution :… Read More Retrieving multiples values from a unsigned char in C
The prototype of GetCurrentDirectory DWORD GetCurrentDirectory( [in] DWORD nBufferLength, [out] LPTSTR lpBuffer ); DWORD is unsigned long, LPTSTR is a pointer to wchar buffer in Unicode environment. It can be called from C++ #define MAX_BUFFER_LENGTH 256 int main() { TCHAR buffer[MAX_BUFFER_LENGTH]; GetCurrentDirectory(MAX_BUFFER_LENGTH, buffer); return 0; } I tried to encapsulate this win32 function in C#,… Read More How to call the Win32 GetCurrentDirectory function from C#?
I am new to c. My Question. Why do some numbers end up negative when the value was positive? Why do some small numbers end up with a huge magnitude when typecast to unsigned? #include <stdio.h> #include <stdbool.h> #include <limits.h> void typecast(int a) { unsigned b = (unsigned) a; unsigned char c = (unsigned char)… Read More Can Some one explain why I get these output?
I’m developing a simple buffering system in VHDL. I get the error I mentioned in the title for "empty" whenever I try to compile. I don’t know why it won’t let me invert a std_logic type. I’ve also been getting errors about the comparisons. For some reason, it doesn’t recognize the ">" and "<" operators… Read More Type of identifier does not agree with its usage as "boolean" type – VHDL in Quartus
class Game() { void add(set<Velocity> & v); } class Velocity() { private: // Member Variables public: // Constructors and methods } void Game::add(set<Velocity> &velocities) { Velocity v; v.setVelocity(); v.setSource(); velocities.insert(v); } As you can see I have a custom class called Game and it has a public method called Add which adds a velocity object… Read More How to use Insert in Set for Custom Data Type ? C++
I want to add 2 unsigned vectors using AVX2 __m256i i1 = _mm256_loadu_si256((__m256i *) si1); __m256i i2 = _mm256_loadu_si256((__m256i *) si2); __m256i result = _mm256_adds_epu16(i2, i1); however I need to have overflow instead of saturation that _mm256_adds_epu16 does to be identical with the non-vectorized code, is there any solution for that? >Solution : Use normal… Read More overflow instead of saturation on 16bit add AVX2
I somewhat successfully overloaded the + operator to add 2 arrays of the same size together. This is my current code //.h #pragma once #include <iostream> template<typename T, size_t S> class MyArray { public: T dataArray[S]; T& operator[](size_t arrayIndex); const T& operator[](size_t arrayIndex) const; MyArray<T, S> operator+(const MyArray& secondSummand) const; constexpr size_t getSize() const; const… Read More How to overload + operator in a Template array class to add every element with the same Index together
I’m working with the win32 API, and am using it to make a window. This window works, but when I open it, the cursor is a loading cursor, and every time I bring my cursor to the edge to resize it, the cursor gets ‘stuck’ as that resizing cursor, it doesn’t go back to normal.… Read More Weird cursor behavior: Almost always the resize cursor. (win32 api)
I’m trying to create an opengl program that creates a 2d square, and applies 2 textures on it. I followed this tutorial: https://learnopengl.com/Getting-started/Textures This is my fragment shader: #version 330 core //in vec3 Color; in vec2 TexCoord; out vec4 FragColor; uniform sampler2D Texture1; uniform sampler2D Texture2; void main() { FragColor = mix(texture(Texture1, TexCoord), texture(Texture2, TexCoord),… Read More opengl won't overlap more than 1 texture