115 lines
2.6 KiB
C++
115 lines
2.6 KiB
C++
#include <iostream>
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#include <cmath>
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#include <array>
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#include <raylib.h>
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#include <raymath.h>
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int screenWidth = 600;
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int screenHeight = 800;
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int pos = 0;
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Vector2 mouseStart;
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float len;
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float ofset;
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bool validHit = false;
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float rotation = 0.0f;
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Rectangle destB;
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Rectangle destA;
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std::array<RenderTexture2D, 2> canvasTexure = {0};
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void init()
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{
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for (size_t i = 0; i < canvasTexure.size(); i++)
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{
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canvasTexure[i] = LoadRenderTexture(screenWidth, screenWidth);
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}
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BeginTextureMode(canvasTexure[0]);
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ClearBackground(WHITE);
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EndTextureMode();
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BeginTextureMode(canvasTexure[1]);
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ClearBackground(BLUE);
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EndTextureMode();
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float posY = (screenHeight - screenWidth) / 2.0f;
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destA = {0, posY, (float)screenWidth, (float)screenWidth};
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destB = destA;
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}
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Vector2 CalculateVector(float rotation, float offSet, float len)
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{
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float angle = ((rotation)*PI) / 180.0f;
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angle += offSet;
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return {
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.x = len * std::sin(angle),
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.y = len * std::cos(angle)};
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}
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void update()
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{
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if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
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{
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mouseStart = GetMousePosition();
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validHit = CheckCollisionPointRec(mouseStart, destA);
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len = Vector2Distance(mouseStart, {destB.x, destB.y});
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ofset = std::atan2(destB.x - mouseStart.x, destB.y - mouseStart.y);
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}
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if (IsMouseButtonDown(MOUSE_BUTTON_LEFT) && validHit)
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{
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Vector2 mousePosition = GetMousePosition();
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float dist = mousePosition.x - mouseStart.x;
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float l = dist / screenWidth;
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rotation = Lerp(45.0f, -45.0f, (l + 1) / 2);
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Vector2 newCenter = CalculateVector(rotation, ofset, len);
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destA.x = newCenter.x + mousePosition.x;
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destA.y = newCenter.y + mousePosition.y;
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}
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if (IsMouseButtonReleased(MOUSE_BUTTON_LEFT) && validHit)
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{
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pos = 1 - pos;
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rotation = 0.0f;
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destA = destB;
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}
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}
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void drawTexureWithRotation(RenderTexture2D &target, Rectangle &dest, float rotation)
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{
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Rectangle source = {0, 0, (float)target.texture.width, (float)-target.texture.height};
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Vector2 origin = {0.0f, 0.0f};
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rotation = 360 - rotation;
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DrawTexturePro(target.texture, source, dest, origin, rotation, WHITE);
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}
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void draw()
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{
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ClearBackground(RED);
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drawTexureWithRotation(canvasTexure[pos], destB, 0.0f);
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drawTexureWithRotation(canvasTexure[1 - pos], destA, rotation);
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}
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int main(int argc, char const *argv[])
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{
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char name[] = "treender";
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int screenWidth = 600;
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int screenHeight = 800;
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InitWindow(screenWidth, screenHeight, name);
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SetTargetFPS(60);
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init();
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while (!WindowShouldClose())
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{
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update();
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BeginDrawing();
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draw();
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EndDrawing();
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}
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CloseWindow();
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return 0;
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}
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