Description

Draw horizontal and vertical lines.

Signature

• void TFT_eSPI::drawFastHLine(int32_t x, int32_t y, int32_t w, uint32_t color)
• void TFT_eSPI::drawFastVLine(int32_t x, int32_t y, int32_t h, uint32_t color)

Parameters

• int32_t x: x coord. from
• int32_t y: y coord. from
• int32_t w: Width.
• int32_t h: Height.
• int32_t color: Color line.

Result

None.

Example

Example 1: drawFastHLine

#include <TFT_eSPI.h>

TFT_eSPI tft = TFT_eSPI();

void setup() {
  tft.init();
  tft.fillScreen(TFT_BLACK); // Clear the screen with black color
}

void loop() {
  tft.drawFastHLine(10, 20, 100, TFT_RED); // Draw a horizontal red line from (10, 20) to (110, 20)
  delay(1000);
}

In this example, we create a TFT_eSPI object tft and initialize it in the setup() function. We then clear the screen with a black color using fillScreen(). In the loop() function, we use drawFastHLine() to draw a horizontal red line from (10, 20) to (110, 20).

Example 2: drawFastVLine

#include <TFT_eSPI.h>

TFT_eSPI tft = TFT_eSPI();

void setup() {
  tft.init();
  tft.fillScreen(TFT_BLACK); // Clear the screen with black color
}

void loop() {
  tft.drawFastVLine(50, 10, 100, TFT_GREEN); // Draw a vertical green line from (50, 10) to (50, 110)
  delay(1000);
}

In this example, we create a TFT_eSPI object tft and initialize it in the setup() function. We then clear the screen with a black color using fillScreen(). In the loop() function, we use drawFastVLine() to draw a vertical green line from (50, 10) to (50, 110).