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Reviewed C compilation issues and formatting
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@raysan5
raysan5 committed Jul 16, 2023
1 parent 70286c7 commit 86f95d7
Showing 1 changed file with 66 additions and 58 deletions.
124 changes: 66 additions & 58 deletions examples/core/core_input_gestures_web.c
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,8 @@
********************************************************************************************/

#include "raylib.h"
#include "math.h" // Required for the protractor angle graphic drawing

#include "math.h" // Required for the protractor angle graphic drawing

#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h> // Required for the Web/HTML5
Expand All @@ -26,21 +27,22 @@

// Common variables definitions
//--------------------------------------------------------------------------------------
int screenWidth = 800;
int screenWidth = 800; // Update depending on web canvas
const int screenHeight = 450;
Vector2 messagePosition = {160, 7};
Vector2 messagePosition = { 160, 7 };

// Last gesture variables definitions
//--------------------------------------------------------------------------------------
int lastGesture = 0;
Vector2 lastGesturePosition = {165, 130};
Vector2 lastGesturePosition = { 165, 130 };

// Gesture log variables definitions and functions declarations
//--------------------------------------------------------------------------------------
#define GESTURE_LOG_SIZE 20
char gestureLog[GESTURE_LOG_SIZE][12] = { "" }; // The gesture log uses an array (as an inverted circular queue) to store the performed gestures
int gestureLogIndex = GESTURE_LOG_SIZE; // The index for the inverted circular queue (moving from last to first direction, then looping around)
int previousGesture = 0;

char const *GetGestureName(int i)
{
switch (i) {
Expand All @@ -58,6 +60,7 @@ char const *GetGestureName(int i)
default: return "Unknown"; break;
}
}

Color GetGestureColor(int i)
{
switch (i) {
Expand All @@ -75,19 +78,21 @@ Color GetGestureColor(int i)
default: return BLACK; break;
}
}
Color gestureColor = BLACK;

int logMode = 1; // Log mode values: 0 shows repeated events; 1 hides repeated events; 2 shows repeated events but hide hold events; 3 hides repeated events and hide hold events
Rectangle logButton1 = {53, 7, 48, 26};
Rectangle logButton2 = {108, 7, 36, 26};
Vector2 gestureLogPosition = {10, 10};

Color gestureColor = { 0, 0, 0, 255 };
Rectangle logButton1 = { 53, 7, 48, 26 };
Rectangle logButton2 = { 108, 7, 36, 26 };
Vector2 gestureLogPosition = { 10, 10 };

// Protractor variables definitions
//--------------------------------------------------------------------------------------
float angleLength = 90.0f;
float currentAngleDegrees = 0.0f;
Vector2 finalVector = {0.0f, 0.0f};
Vector2 finalVector = { 0.0f, 0.0f };
char currentAngleStr[7] = "";
Vector2 protractorPosition = {266.0f, 315.0f};
Vector2 protractorPosition = { 266.0f, 315.0f };

// Update
//--------------------------------------------------------------------------------------
Expand All @@ -103,39 +108,40 @@ void Update(void)

// Handle last gesture
//--------------------------------------------------------------------------------------
if ( currentGesture != 0 && currentGesture != 4 && currentGesture != previousGesture ) lastGesture = currentGesture; // Filter the meaningful gestures (1, 2, 8 to 512) for the display
if ((currentGesture != 0) && (currentGesture != 4) && (currentGesture != previousGesture)) lastGesture = currentGesture; // Filter the meaningful gestures (1, 2, 8 to 512) for the display

// Handle gesture log
//--------------------------------------------------------------------------------------
if ( IsMouseButtonReleased(MOUSE_BUTTON_LEFT) )
if (IsMouseButtonReleased(MOUSE_BUTTON_LEFT))
{
if ( CheckCollisionPointRec(GetMousePosition(), logButton1 ) )
if (CheckCollisionPointRec(GetMousePosition(), logButton1))
{
switch (logMode)
{
case 3: logMode=2; break;
case 2: logMode=3; break;
case 1: logMode=0; break;
default: logMode=1; break;
case 3: logMode=2; break;
case 2: logMode=3; break;
case 1: logMode=0; break;
default: logMode=1; break;
}
}
else if ( CheckCollisionPointRec(GetMousePosition(), logButton2) )
else if (CheckCollisionPointRec(GetMousePosition(), logButton2))
{
switch (logMode)
{
case 3: logMode=1; break;
case 2: logMode=0; break;
case 1: logMode=3; break;
default: logMode=2; break;
case 3: logMode=1; break;
case 2: logMode=0; break;
case 1: logMode=3; break;
default: logMode=2; break;
}
}
}

int fillLog = 0; // Gate variable to be used to allow or not the gesture log to be filled
if (currentGesture !=0)
{
if (logMode == 3) // 3 hides repeated events and hide hold events
{
if ( ( currentGesture != 4 && currentGesture != previousGesture ) || currentGesture < 3 ) fillLog = 1;
if (((currentGesture != 4) && (currentGesture != previousGesture)) || (currentGesture < 3)) fillLog = 1;
}
else if (logMode == 2) // 2 shows repeated events but hide hold events
{
Expand All @@ -150,13 +156,16 @@ void Update(void)
fillLog = 1;
}
}

if (fillLog) // If one of the conditions from logMode was met, fill the gesture log
{
previousGesture = currentGesture;
gestureColor = GetGestureColor(currentGesture);
if (gestureLogIndex <= 0) gestureLogIndex = GESTURE_LOG_SIZE;
gestureLogIndex--;
TextCopy( gestureLog[gestureLogIndex], GetGestureName(currentGesture) ); // Copy the gesture respective name to the gesture log array

// Copy the gesture respective name to the gesture log array
TextCopy(gestureLog[gestureLogIndex], GetGestureName(currentGesture));
}

// Handle protractor
Expand All @@ -173,29 +182,30 @@ void Update(void)
{
currentAngleDegrees = 0.0f;
}
float currentAngleRadians = ( (currentAngleDegrees +90.0f)*PI/180 ); // Convert the current angle to Radians
finalVector = (Vector2){ ( angleLength*sinf(currentAngleRadians) ) + protractorPosition.x, ( angleLength*cosf(currentAngleRadians) ) + protractorPosition.y }; // Calculate the final vector for display

float currentAngleRadians = ((currentAngleDegrees +90.0f)*PI/180); // Convert the current angle to Radians
finalVector = (Vector2){ (angleLength*sinf(currentAngleRadians)) + protractorPosition.x, (angleLength*cosf(currentAngleRadians)) + protractorPosition.y }; // Calculate the final vector for display

// Handle touch and mouse pointer points
//--------------------------------------------------------------------------------------
Vector2 touchPosition[touchCount];
#define MAX_TOUCH_COUNT 32

Vector2 touchPosition[MAX_TOUCH_COUNT] = { 0 };
Vector2 mousePosition = {0, 0};
if (currentGesture != GESTURE_NONE)
{
if (touchCount != 0)
{
for (i = 0; i < touchCount; i++) touchPosition[i] = GetTouchPosition(i); // Fill the touch positions
}
else
{
mousePosition = GetMousePosition();
}
else mousePosition = GetMousePosition();
}

// Draw
//--------------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);

ClearBackground(RAYWHITE);

// Draw common
//--------------------------------------------------------------------------------------
Expand All @@ -216,29 +226,30 @@ void Update(void)
DrawRing( (Vector2){lastGesturePosition.x + 103, lastGesturePosition.y + 16}, 6.0f, 11.0f, 0.0f, 360.0f, 0, lastGesture == GESTURE_DRAG ? LIME : LIGHTGRAY);
DrawCircle(lastGesturePosition.x + 80, lastGesturePosition.y + 43, 10, lastGesture == GESTURE_DOUBLETAP ? SKYBLUE : LIGHTGRAY);
DrawCircle(lastGesturePosition.x + 103, lastGesturePosition.y + 43, 10, lastGesture == GESTURE_DOUBLETAP ? SKYBLUE : LIGHTGRAY);
DrawTriangle( (Vector2){lastGesturePosition.x + 122, lastGesturePosition.y + 16}, (Vector2){lastGesturePosition.x + 137, lastGesturePosition.y + 26}, (Vector2){lastGesturePosition.x + 137, lastGesturePosition.y + 6}, lastGesture == GESTURE_PINCH_OUT ? ORANGE : LIGHTGRAY);
DrawTriangle( (Vector2){lastGesturePosition.x + 147, lastGesturePosition.y + 6}, (Vector2){lastGesturePosition.x + 147, lastGesturePosition.y + 26}, (Vector2){lastGesturePosition.x + 162, lastGesturePosition.y + 16}, lastGesture == GESTURE_PINCH_OUT ? ORANGE : LIGHTGRAY);
DrawTriangle( (Vector2){lastGesturePosition.x + 125, lastGesturePosition.y + 33}, (Vector2){lastGesturePosition.x + 125, lastGesturePosition.y + 53}, (Vector2){lastGesturePosition.x + 140, lastGesturePosition.y + 43}, lastGesture == GESTURE_PINCH_IN ? VIOLET : LIGHTGRAY);
DrawTriangle( (Vector2){lastGesturePosition.x + 144, lastGesturePosition.y + 43}, (Vector2){lastGesturePosition.x + 159, lastGesturePosition.y + 53}, (Vector2){lastGesturePosition.x + 159, lastGesturePosition.y + 33}, lastGesture == GESTURE_PINCH_IN ? VIOLET : LIGHTGRAY);
for ( i = 0; i < 4; i++ ) DrawCircle(lastGesturePosition.x + 180, lastGesturePosition.y + 7 + i*15, 5, touchCount <= i ? LIGHTGRAY : gestureColor);
DrawTriangle((Vector2){ lastGesturePosition.x + 122, lastGesturePosition.y + 16 }, (Vector2){ lastGesturePosition.x + 137, lastGesturePosition.y + 26 }, (Vector2){ lastGesturePosition.x + 137, lastGesturePosition.y + 6 }, lastGesture == GESTURE_PINCH_OUT? ORANGE : LIGHTGRAY);
DrawTriangle((Vector2){ lastGesturePosition.x + 147, lastGesturePosition.y + 6 }, (Vector2){ lastGesturePosition.x + 147, lastGesturePosition.y + 26 }, (Vector2){ lastGesturePosition.x + 162, lastGesturePosition.y + 16 }, lastGesture == GESTURE_PINCH_OUT? ORANGE : LIGHTGRAY);
DrawTriangle((Vector2){ lastGesturePosition.x + 125, lastGesturePosition.y + 33 }, (Vector2){ lastGesturePosition.x + 125, lastGesturePosition.y + 53 }, (Vector2){ lastGesturePosition.x + 140, lastGesturePosition.y + 43 }, lastGesture == GESTURE_PINCH_IN? VIOLET : LIGHTGRAY);
DrawTriangle((Vector2){ lastGesturePosition.x + 144, lastGesturePosition.y + 43 }, (Vector2){ lastGesturePosition.x + 159, lastGesturePosition.y + 53 }, (Vector2){ lastGesturePosition.x + 159, lastGesturePosition.y + 33 }, lastGesture == GESTURE_PINCH_IN? VIOLET : LIGHTGRAY);
for (i = 0; i < 4; i++) DrawCircle(lastGesturePosition.x + 180, lastGesturePosition.y + 7 + i*15, 5, touchCount <= i? LIGHTGRAY : gestureColor);

// Draw gesture log
//--------------------------------------------------------------------------------------
DrawText("Log", gestureLogPosition.x, gestureLogPosition.y, 20, BLACK);

// Loop in both directions to print the gesture log array in the inverted order (and looping around if the index started somewhere in the middle)
for (i = 0, ii = gestureLogIndex; i < GESTURE_LOG_SIZE; i++, ii = (ii + 1) % GESTURE_LOG_SIZE) DrawText(gestureLog[ii], gestureLogPosition.x, gestureLogPosition.y + 410 - i*20, 20, (i == 0 ? gestureColor : LIGHTGRAY));
Color logButton1Color, logButton2Color;
switch (logMode)
{
case 3: logButton1Color=MAROON; logButton2Color=MAROON; break;
case 2: logButton1Color=GRAY; logButton2Color=MAROON; break;
case 1: logButton1Color=MAROON; logButton2Color=GRAY; break;
default: logButton1Color=GRAY; logButton2Color=GRAY; break;
case 3: logButton1Color=MAROON; logButton2Color=MAROON; break;
case 2: logButton1Color=GRAY; logButton2Color=MAROON; break;
case 1: logButton1Color=MAROON; logButton2Color=GRAY; break;
default: logButton1Color=GRAY; logButton2Color=GRAY; break;
}
DrawRectangleRec( logButton1, logButton1Color);
DrawRectangleRec(logButton1, logButton1Color);
DrawText("Hide", logButton1.x + 7, logButton1.y + 3, 10, WHITE);
DrawText("Repeat", logButton1.x + 7, logButton1.y + 13, 10, WHITE);
DrawRectangleRec( logButton2, logButton2Color);
DrawRectangleRec(logButton2, logButton2Color);
DrawText("Hide", logButton1.x + 62, logButton1.y + 3, 10, WHITE);
DrawText("Hold", logButton1.x + 62, logButton1.y + 13, 10, WHITE);

Expand All @@ -250,10 +261,10 @@ void Update(void)
const char *angleStringTrim = TextSubtext(angleString, 0, angleStringDot + 3);
DrawText( angleStringTrim, protractorPosition.x + 55, protractorPosition.y + 92, 20, gestureColor);
DrawCircle(protractorPosition.x, protractorPosition.y, 80.0f, WHITE);
DrawLineEx( (Vector2){protractorPosition.x - 90, protractorPosition.y}, (Vector2){protractorPosition.x + 90, protractorPosition.y}, 3.0f, LIGHTGRAY);
DrawLineEx( (Vector2){protractorPosition.x, protractorPosition.y - 90}, (Vector2){protractorPosition.x, protractorPosition.y + 90}, 3.0f, LIGHTGRAY);
DrawLineEx( (Vector2){protractorPosition.x - 80, protractorPosition.y - 45}, (Vector2){protractorPosition.x + 80, protractorPosition.y + 45}, 3.0f, GREEN);
DrawLineEx( (Vector2){protractorPosition.x - 80, protractorPosition.y + 45}, (Vector2){protractorPosition.x + 80, protractorPosition.y - 45}, 3.0f, GREEN);
DrawLineEx((Vector2){ protractorPosition.x - 90, protractorPosition.y }, (Vector2){ protractorPosition.x + 90, protractorPosition.y }, 3.0f, LIGHTGRAY);
DrawLineEx((Vector2){ protractorPosition.x, protractorPosition.y - 90 }, (Vector2){ protractorPosition.x, protractorPosition.y + 90 }, 3.0f, LIGHTGRAY);
DrawLineEx((Vector2){ protractorPosition.x - 80, protractorPosition.y - 45 }, (Vector2){ protractorPosition.x + 80, protractorPosition.y + 45 }, 3.0f, GREEN);
DrawLineEx((Vector2){ protractorPosition.x - 80, protractorPosition.y + 45 }, (Vector2){ protractorPosition.x + 80, protractorPosition.y - 45 }, 3.0f, GREEN);
DrawText("0", protractorPosition.x + 96, protractorPosition.y - 9, 20, BLACK);
DrawText("30", protractorPosition.x + 74, protractorPosition.y - 68, 20, BLACK);
DrawText("90", protractorPosition.x - 11, protractorPosition.y - 110, 20, BLACK);
Expand All @@ -262,7 +273,7 @@ void Update(void)
DrawText("210", protractorPosition.x - 100, protractorPosition.y + 50, 20, BLACK);
DrawText("270", protractorPosition.x - 18, protractorPosition.y + 92, 20, BLACK);
DrawText("330", protractorPosition.x + 72, protractorPosition.y + 50, 20, BLACK);
if ( currentAngleDegrees != 0.0f ) DrawLineEx( protractorPosition, finalVector, 3.0f, gestureColor);
if (currentAngleDegrees != 0.0f) DrawLineEx(protractorPosition, finalVector, 3.0f, gestureColor);

// Draw touch and mouse pointer points
//--------------------------------------------------------------------------------------
Expand All @@ -275,7 +286,8 @@ void Update(void)
DrawCircleV(touchPosition[i], 50.0f, Fade(gestureColor, 0.5f));
DrawCircleV(touchPosition[i], 5.0f, gestureColor);
}
if (touchCount == 2) DrawLineEx( touchPosition[0], touchPosition[1], (currentGesture == 512 ? 8 : 12), gestureColor);

if (touchCount == 2) DrawLineEx(touchPosition[0], touchPosition[1], ((currentGesture == 512)? 8 : 12), gestureColor);
}
else
{
Expand All @@ -297,15 +309,11 @@ int main(void)
// Initialization
//--------------------------------------------------------------------------------------
#if defined( PLATFORM_WEB )
const int canvasWidth = EM_ASM_INT( return document.getElementById('canvas').getBoundingClientRect().width; ); // Using Emscripten EM_ASM_INT macro, get the page canvas width
if (canvasWidth > 400)
{
screenWidth = canvasWidth;
}
else
{
screenWidth = 400; // Set a minimum width for the screen
}
// Using Emscripten EM_ASM_INT macro, get the page canvas width
const int canvasWidth = EM_ASM_INT( return document.getElementById('canvas').getBoundingClientRect().width; );

if (canvasWidth > 400) screenWidth = canvasWidth;
else screenWidth = 400; // Set a minimum width for the screen
#endif

InitWindow(screenWidth, screenHeight, "raylib [core] example - input gestures web");
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