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authorbonmas14 <bonmas14@gmail.com>2025-09-20 22:28:15 +0300
committerbonmas14 <bonmas14@gmail.com>2025-09-20 22:28:15 +0300
commitcdda4c4182c9ee068567529715e4a5c68a8efb58 (patch)
tree38a63f62a64018a2d35fc33354f8589fd33b7514 /deps/raylib/examples/others/raymath_vector_angle.c
downloadc_wizard-cdda4c4182c9ee068567529715e4a5c68a8efb58.tar.gz
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+/*******************************************************************************************
+*
+* raylib [shapes] example - Vector Angle
+*
+* Example originally created with raylib 1.0, last time updated with raylib 4.6
+*
+* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+* BSD-like license that allows static linking with closed source software
+*
+* Copyright (c) 2023 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include "raymath.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+ // Initialization
+ //--------------------------------------------------------------------------------------
+ const int screenWidth = 800;
+ const int screenHeight = 450;
+
+ InitWindow(screenWidth, screenHeight, "raylib [math] example - vector angle");
+
+ Vector2 v0 = { screenWidth/2, screenHeight/2 };
+ Vector2 v1 = Vector2Add(v0, (Vector2){ 100.0f, 80.0f });
+ Vector2 v2 = { 0 }; // Updated with mouse position
+
+ float angle = 0.0f; // Angle in degrees
+ int angleMode = 0; // 0-Vector2Angle(), 1-Vector2LineAngle()
+
+ SetTargetFPS(60); // Set our game to run at 60 frames-per-second
+ //--------------------------------------------------------------------------------------
+
+ // Main game loop
+ while (!WindowShouldClose()) // Detect window close button or ESC key
+ {
+ // Update
+ //----------------------------------------------------------------------------------
+ float startangle = 0.0f;
+
+ if (angleMode == 0) startangle = -Vector2LineAngle(v0, v1)*RAD2DEG;
+ if (angleMode == 1) startangle = 0.0f;
+
+ v2 = GetMousePosition();
+
+ if (IsKeyPressed(KEY_SPACE)) angleMode = !angleMode;
+
+ if(angleMode == 0 && IsMouseButtonDown(MOUSE_BUTTON_RIGHT)) v1 = GetMousePosition();
+
+ if (angleMode == 0)
+ {
+ // Calculate angle between two vectors, considering a common origin (v0)
+ Vector2 v1Normal = Vector2Normalize(Vector2Subtract(v1, v0));
+ Vector2 v2Normal = Vector2Normalize(Vector2Subtract(v2, v0));
+
+ angle = Vector2Angle(v1Normal, v2Normal)*RAD2DEG;
+ }
+ else if (angleMode == 1)
+ {
+ // Calculate angle defined by a two vectors line, in reference to horizontal line
+ angle = Vector2LineAngle(v0, v2)*RAD2DEG;
+ }
+ //----------------------------------------------------------------------------------
+
+ // Draw
+ //----------------------------------------------------------------------------------
+ BeginDrawing();
+
+ ClearBackground(RAYWHITE);
+
+ if (angleMode == 0)
+ {
+ DrawText("MODE 0: Angle between V1 and V2", 10, 10, 20, BLACK);
+ DrawText("Right Click to Move V2", 10, 30, 20, DARKGRAY);
+
+ DrawLineEx(v0, v1, 2.0f, BLACK);
+ DrawLineEx(v0, v2, 2.0f, RED);
+
+ DrawCircleSector(v0, 40.0f, startangle, startangle + angle, 32, Fade(GREEN, 0.6f));
+ }
+ else if (angleMode == 1)
+ {
+ DrawText("MODE 1: Angle formed by line V1 to V2", 10, 10, 20, BLACK);
+
+ DrawLine(0, screenHeight/2, screenWidth, screenHeight/2, LIGHTGRAY);
+ DrawLineEx(v0, v2, 2.0f, RED);
+
+ DrawCircleSector(v0, 40.0f, startangle, startangle - angle, 32, Fade(GREEN, 0.6f));
+ }
+
+ DrawText("v0", v0.x, v0.y, 10, DARKGRAY);
+
+ // If the line from v0 to v1 would overlap the text, move it's position up 10
+ if (angleMode == 0 && Vector2Subtract(v0, v1).y > 0.0f) DrawText("v1", v1.x, v1.y-10.0f, 10, DARKGRAY);
+ if (angleMode == 0 && Vector2Subtract(v0, v1).y < 0.0f) DrawText("v1", v1.x, v1.y, 10, DARKGRAY);
+
+ // If angle mode 1, use v1 to emphasize the horizontal line
+ if (angleMode == 1) DrawText("v1", v0.x + 40.0f, v0.y, 10, DARKGRAY);
+
+ // position adjusted by -10 so it isn't hidden by cursor
+ DrawText("v2", v2.x-10.0f, v2.y-10.0f, 10, DARKGRAY);
+
+ DrawText("Press SPACE to change MODE", 460, 10, 20, DARKGRAY);
+ DrawText(TextFormat("ANGLE: %2.2f", angle), 10, 70, 20, LIME);
+
+ EndDrawing();
+ //----------------------------------------------------------------------------------
+ }
+
+ // De-Initialization
+ //--------------------------------------------------------------------------------------
+ CloseWindow(); // Close window and OpenGL context
+ //--------------------------------------------------------------------------------------
+
+ return 0;
+}