rasmus/mandelbrot
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rasmus
2026-01-30 21:40:14 +01:00
parent 7ee1bc6245
commit 1d9ed8561a
2 changed files with 62 additions and 16 deletions
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9
include/constants.hpp
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@@ -2,10 +2,7 @@
namespace Constants { namespace Constants {
constexpr int maxIterations{2000}; constexpr int maxIterations{2000};
constexpr int windowWidth{600}; constexpr int windowWidth{900};
constexpr int windowHeight{600}; constexpr int windowHeight{900};
constexpr double posRealRange{1.0};
constexpr double negRealRange{-2.5};
constexpr double posImagRange{1.25};
constexpr double negImagRange{-1.25};
} // Namespace Constants } // Namespace Constants

63
main.cpp
View File

@@ -9,7 +9,8 @@ Color LerpColor(Color a, Color b, float t) {
(unsigned char)(a.b + (b.b - a.b) * t), 255}; (unsigned char)(a.b + (b.b - a.b) * t), 255};
} }
void drawMandelbrot() { void drawMandelbrot(double maxReal = 1.0, double minReal = -2.5,
double maxImag = 1.25, double minImag = -1.25) {
using namespace Constants; using namespace Constants;
double xNorm{}; double xNorm{};
@@ -17,37 +18,85 @@ void drawMandelbrot() {
double cReal{}; double cReal{};
double cImag{}; double cImag{};
for (int x{}; x <= Constants::windowWidth; ++x) { for (int x{}; x <= windowWidth; ++x) {
for (int y{}; y <= Constants::windowHeight; ++y) { for (int y{}; y <= windowHeight; ++y) {
xNorm = x / static_cast<double>(Constants::windowWidth); xNorm = x / static_cast<double>(Constants::windowWidth);
yNorm = y / static_cast<double>(Constants::windowHeight); yNorm = y / static_cast<double>(Constants::windowHeight);
cReal = negRealRange + xNorm * (posRealRange - negRealRange); cReal = minReal + xNorm * (maxReal - minReal);
cImag = negImagRange + yNorm * (posImagRange - negImagRange); cImag = minImag + yNorm * (maxImag - minImag);
int iterationsMandelbrot{calculateMandelbrot(cReal, cImag)}; int iterationsMandelbrot{calculateMandelbrot(cReal, cImag)};
if (iterationsMandelbrot - 1 == maxIterations) {
DrawPixel(x, y, BLACK);
} else {
float t = static_cast<float>(iterationsMandelbrot) / maxIterations; float t = static_cast<float>(iterationsMandelbrot) / maxIterations;
Color color = LerpColor(BLUE, RED, t); Color color = LerpColor(BLUE, RED, t);
DrawPixel(x, y, color); DrawPixel(x, y, color);
}
// std::cout << "Iterations: " << iterationsMandelbrot << '\n'; // std::cout << "Iterations: " << iterationsMandelbrot << '\n';
} }
} }
} }
int main() { int main() {
double maxReal{1.0};
double minReal{-2.5};
double maxImag{1.25};
double minImag{-1.25};
InitWindow(Constants::windowWidth, Constants::windowHeight, InitWindow(Constants::windowWidth, Constants::windowHeight,
"Mandelbrot Plot"); "Mandelbrot Plot");
SetTargetFPS(60); SetTargetFPS(60);
RenderTexture2D target =
LoadRenderTexture(Constants::windowWidth, Constants::windowHeight);
bool needsRedraw = true;
while (!WindowShouldClose()) { while (!WindowShouldClose()) {
if (IsKeyPressed(KEY_UP)) {
maxImag += 0.1;
minImag += 0.1;
needsRedraw = true;
std::cout << "Runter!" << '\n';
}
if (IsKeyPressed(KEY_DOWN)) {
maxImag -= 0.1;
minImag -= 0.1;
needsRedraw = true;
std::cout << "Hoch!" << '\n';
}
if (IsKeyPressed(KEY_LEFT)) {
maxReal += 0.1;
minReal += 0.1;
needsRedraw = true;
std::cout << "Links!" << '\n';
}
if (IsKeyPressed(KEY_RIGHT)) {
maxReal -= 0.1;
minReal -= 0.1;
needsRedraw = true;
std::cout << "Rechts!" << '\n';
}
if (needsRedraw) {
BeginTextureMode(target);
ClearBackground(RAYWHITE);
drawMandelbrot(maxReal, minReal, maxImag, minImag);
EndTextureMode();
needsRedraw = false;
}
BeginDrawing(); BeginDrawing();
ClearBackground(RAYWHITE); DrawTextureRec(
drawMandelbrot(); target.texture,
{0, 0, (float)target.texture.width, -(float)target.texture.height},
{0, 0}, WHITE);
EndDrawing(); EndDrawing();
} }
UnloadRenderTexture(target);
CloseWindow(); CloseWindow();
return 0; return 0;
} }