110 lines
4.0 KiB
C++
110 lines
4.0 KiB
C++
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/*******************************************************************************************
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*
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* raylib [textures] example - Bunnymark
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*
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* This example has been created using raylib 1.6 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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*
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* Copyright (c) 2014-2019 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include <list>
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#include "raylib-cpp.hpp"
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// This is the maximum amount of elements (quads) per batch
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// NOTE: This value is defined in [rlgl] module and can be changed there
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#define MAX_BATCH_ELEMENTS 8192
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class Bunny {
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public:
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Bunny() {
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position = GetMousePosition();
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speed.x = static_cast<float>(GetRandomValue(-250, 250)) / 60.0f;
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speed.y = static_cast<float>(GetRandomValue(-250, 250)) / 60.0f;
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color = raylib::Color(
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GetRandomValue(50, 240),
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GetRandomValue(80, 240),
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GetRandomValue(100, 240));
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}
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void Update(const raylib::Texture2D& texBunny) {
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position.x += speed.x;
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position.y += speed.y;
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if (((position.x + texBunny.width/2) > GetScreenWidth()) ||
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((position.x + texBunny.width/2) < 0)) speed.x *= -1;
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if (((position.y + texBunny.height/2) > GetScreenHeight()) ||
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((position.y + texBunny.height/2 - 40) < 0)) speed.y *= -1;
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}
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Vector2 position;
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Vector2 speed;
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Color color;
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};
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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raylib::Window window(screenWidth, screenHeight, "raylib [textures] example - bunnymark");
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// Load bunny texture
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raylib::Texture2D texBunny("resources/wabbit_alpha.png");
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std::list<Bunny> bunnies;
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!window.ShouldClose()) { // Detect window close button or ESC key
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// Update
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//----------------------------------------------------------------------------------
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if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) {
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// Create more bunnies
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for (int i = 0; i < 100; i++) {
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bunnies.emplace_back();
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}
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}
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// Update bunnies
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for (Bunny& bunny: bunnies) {
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bunny.Update(texBunny);
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}
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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{
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window.ClearBackground(RAYWHITE);
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for (Bunny& bunny : bunnies) {
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// NOTE: When internal batch buffer limit is reached (MAX_BATCH_ELEMENTS),
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// a draw call is launched and buffer starts being filled again;
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// before issuing a draw call, updated vertex data from internal CPU buffer is send to GPU...
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// Process of sending data is costly and it could happen that GPU data has not been completely
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// processed for drawing while new data is tried to be sent (updating current in-use buffers)
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// it could generates a stall and consequently a frame drop, limiting the number of drawn bunnies
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texBunny.Draw(bunny.position, bunny.color);
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}
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DrawRectangle(0, 0, screenWidth, 40, BLACK);
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raylib::DrawText(TextFormat("bunnies: %i", bunnies.size()), 120, 10, 20, GREEN);
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raylib::DrawText(TextFormat("batched draw calls: %i", 1 + bunnies.size()/MAX_BATCH_ELEMENTS), 320, 10, 20, MAROON);
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DrawFPS(10, 10);
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}
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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return 0;
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}
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