Description

Draw a triangle outline using 3 arbitrary points.

Signature

void TFT_eSPI::drawTriangle(int32_t x0, int32_t y0, 
                            int32_t x1, int32_t y1, 
                            int32_t x2, int32_t y2, 
                            uint32_t color)

Parameters

• ìnt32_t x0: first point x coord.
• ìnt32_t y0: first point y coord.
• ìnt32_t x1: second point x coord.
• ìnt32_t y1: second point y coord.
• ìnt32_t x2: third point x coord.
• ìnt32_t y2: third point y coord.
• uìnt32_t color: outline color.

Result

None

Example

#include <TFT_eSPI.h>

TFT_eSPI tft = TFT_eSPI();

void setup() {
  tft.init();
  tft.fillScreen(TFT_BLACK); // clear the screen
}

void loop() {
  // Draw a triangle with a yellow border
  tft.drawTriangle(50, 50, 100, 150, 150, 50, TFT_YELLOW);
  delay(1000);
}

In this example, we use drawTriangle to draw a triangle with the following parameters:

• x1: 50 (the x-coordinate of the first vertex)
• y1: 50 (the y-coordinate of the first vertex)
• x2: 100 (the x-coordinate of the second vertex)
• y2: 150 (the y-coordinate of the second vertex)
• x3: 150 (the x-coordinate of the third vertex)
• y3: 50 (the y-coordinate of the third vertex)
• color: TFT_YELLOW (the color of the border)

This will draw a triangle with a yellow border, with vertices at (50, 50), (100, 150), and (150, 50).