124 lines
2.7 KiB
C++
124 lines
2.7 KiB
C++
#include "BackGround.hpp"
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#include "Math.hpp"
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#include "raylib.h"
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#include "rlgl.h"
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#include "external/stb_perlin.h"
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// Public
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void BackGround::init(int size)
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{
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this->size = size;
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mountenData.assign(mountenDataCap, 0);
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}
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void BackGround::newGen()
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{
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ClearBackground(backGroundColor);
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starts();
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moon();
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mounten();
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}
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void BackGround::starts()
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{
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rlSetTexture(texShapes.id);
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rlBegin(RL_QUADS);
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rlNormal3f(0.0f, 0.0f, 1.0f);
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for (size_t i = 1; i <= numOfStarts; i++)
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{
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int x = GetRandomValue(0, size);
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int y = GetRandomValue(0, size);
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int weight = GetRandomValue(1, 3);
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float alph = ((float)GetRandomValue(10, 200)) / 255.0f;
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Color color = ColorLerp(backGroundColor, starColor, alph);
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rlColor4ub(color.r, color.g, color.b, color.a);
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// topLeft
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rlTexCoord2f(0, 0);
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rlVertex2f(x, y);
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// bottomLeft
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rlTexCoord2f(0, 1);
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rlVertex2f(x, y + weight);
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// bottomRight
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rlTexCoord2f(1, 1);
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rlVertex2f(x + weight, y + weight);
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// topRight
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rlTexCoord2f(1, 0);
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rlVertex2f(x + weight, y);
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}
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rlEnd();
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rlSetTexture(0);
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}
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void BackGround::moon()
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{
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int xpos = GetRandomValue(100, size - 100);
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int ypos = GetRandomValue(100, maxYPosOfMoon);
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int r = GetRandomValue(minSizeOfMoon, maxSizeOfMoon);
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DrawCircle(xpos, ypos, r + 20, ColorLerp(backGroundColor, moonColor, 0.02f));
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DrawCircle(xpos, ypos, r + 10, ColorLerp(backGroundColor, moonColor, 0.05f));
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DrawCircle(xpos, ypos, r, moonColor);
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}
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void BackGround::mounten()
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{
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int len = 20;
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int offsetX = GetRandomValue(20, 1000);
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int offsetY = GetRandomValue(20, 1000);
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float sc = (4 / (float)len);
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for (size_t i = 0; i < mountenData.size(); i++)
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{
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float nx = (float)(i + offsetX) * sc;
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float p = stb_perlin_fbm_noise3(nx, offsetY, 1.0f, 2.0f, 0.5f, 6);
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if (p < -1.0f)
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p = -1.0f;
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if (p > 1.0f)
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p = 1.0f;
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// mountenData[i] = (p + 1.0f) / 2.0f;
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mountenData[i] = p;
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}
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drawMounten(600, 100, mountenColor);
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}
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void BackGround::drawMounten(int line, int varience, Color color)
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{
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int x = 0;
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int diff = size / (mountenData.size() - 1);
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rlSetTexture(texShapes.id);
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rlBegin(RL_QUADS);
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rlNormal3f(0.0f, 0.0f, 1.0f);
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rlColor4ub(color.r, color.g, color.b, color.a);
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int pervY = line + (mountenData[0] * varience);
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for (size_t i = 1; i <= mountenData.size(); i++)
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{
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// topLeft
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rlTexCoord2f(0, 0);
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rlVertex2f(x, pervY);
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// bottomLeft
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rlTexCoord2f(0, 1);
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rlVertex2f(x, size);
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x += diff;
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pervY = line + (mountenData[i] * varience);
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// bottomRight
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rlTexCoord2f(1, 1);
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rlVertex2f(x, size);
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// topRight
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rlTexCoord2f(1, 0);
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rlVertex2f(x, pervY);
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}
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rlEnd();
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rlSetTexture(0);
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} |