diff --git a/examples/core/core_input_gestures_web.c b/examples/core/core_input_gestures_web.c index 0ee3d1c5e9e3..0129a983b2f9 100644 --- a/examples/core/core_input_gestures_web.c +++ b/examples/core/core_input_gestures_web.c @@ -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 // Required for the Web/HTML5 @@ -26,14 +27,14 @@ // 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 //-------------------------------------------------------------------------------------- @@ -41,6 +42,7 @@ Vector2 lastGesturePosition = {165, 130}; 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) { @@ -58,6 +60,7 @@ char const *GetGestureName(int i) default: return "Unknown"; break; } } + Color GetGestureColor(int i) { switch (i) { @@ -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 //-------------------------------------------------------------------------------------- @@ -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 { @@ -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 @@ -173,12 +182,15 @@ 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) { @@ -186,16 +198,14 @@ void Update(void) { 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 //-------------------------------------------------------------------------------------- @@ -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); @@ -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); @@ -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 //-------------------------------------------------------------------------------------- @@ -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 { @@ -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");