SDL_RenderDrawLines
Use this function to draw a series of connected lines on the current rendering target.
Contents
Syntax
int SDL_RenderDrawLines(SDL_Renderer* renderer,
const SDL_Point* points,
int count)
Function Parameters
renderer |
the rendering context |
points |
an array of SDL_Point structures representing points along the lines |
count |
the number of points, drawing count-1 lines |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
#include "SDL.h"
#define POINTS_COUNT 4
static SDL_Point points[POINTS_COUNT] = {
{320, 200},
{300, 240},
{340, 240},
{320, 200}
};
int main(int argc, char* argv[])
{
if (SDL_Init(SDL_INIT_VIDEO) == 0) {
SDL_Window* window = NULL;
SDL_Renderer* renderer = NULL;
if (SDL_CreateWindowAndRenderer(640, 480, 0, &window, &renderer) == 0) {
SDL_bool done = SDL_FALSE;
while (!done) {
SDL_Event event;
SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
SDL_RenderClear(renderer);
SDL_SetRenderDrawColor(renderer, 255, 255, 255, SDL_ALPHA_OPAQUE);
SDL_RenderDrawLines(renderer, points, POINTS_COUNT);
SDL_RenderPresent(renderer);
while (SDL_PollEvent(&event)) {
if (event.type == SDL_QUIT) {
done = SDL_TRUE;
}
}
}
}
if (renderer) {
SDL_DestroyRenderer(renderer);
}
if (window) {
SDL_DestroyWindow(window);
}
}
SDL_Quit();
return 0;
}
Remarks
You can add useful comments here
Version
This function is available since SDL 2.0.0.
