277 lines
6 KiB
C++
277 lines
6 KiB
C++
/**
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WIP raycasting demo for Pokitto.
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Don't forget to compile with -O3!
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author: Miloslav "drummyfish" Ciz
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license: CC0
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*/
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//#define RAYCAST_TINY
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#include <stdio.h>
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#include "raycastlib.h"
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#include "Pokitto.h"
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#include <stdlib.h>
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#define SUBSAMPLE 3
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// r: 3 bits, g: 3 bits, b: 2 bits
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inline uint8_t rgbToIndex(uint8_t r, uint8_t g, uint8_t b)
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{
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return (r & 0b00000111) | ((g & 0b00000111) << 3) | ((b & 0b00000011) << 6);
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}
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class Level
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{
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public:
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int16_t getHeight(int16_t x, int16_t y)
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{
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if (x > 12 || y > 12)
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return max(x,y) - 10;
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if (y < 5 && y > 0)
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{
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return y > 2 ? x : -x;
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}
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return (x < 0 || y < 0 || x > 9 || y > 9) ? 4 : 0;
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}
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};
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class Character
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{
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public:
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Camera mCamera;
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Character()
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{
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mCamera.position.x = 7695; // UNITS_PER_SQUARE * 4;
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mCamera.position.y = 7697; //UNITS_PER_SQUARE * 5;
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mCamera.direction = -500; //0;
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mCamera.fovAngle = UNITS_PER_SQUARE / 4;
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mCamera.height = 2756; //UNITS_PER_SQUARE / 2;
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mCamera.resolution.x = 110 / SUBSAMPLE;
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mCamera.resolution.y = 88;
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}
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};
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Pokitto::Core p;
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Character player;
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Level level;
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Unit heightFunc(int16_t x, int16_t y)
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{
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return level.getHeight(x,y) * UNITS_PER_SQUARE / 4;
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}
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bool dither(uint8_t intensity, uint32_t x, uint32_t y)
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{
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switch (intensity)
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{
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case 0: return false; break;
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case 1: return x % 2 == 0 && y % 2 == 0; break;
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case 2: return x % 2 == y % 2; break;
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case 3: return x % 2 != 0 || y % 2 != 0; break;
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default: return true; break;
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}
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}
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inline void pixelFunc(PixelInfo pixel)
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{
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/*
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uint8_t c = 3 + (pixel.isWall == 0 ? 12 : (pixel.hit.direction * 3));
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Unit depth = pixel.depth - UNITS_PER_SQUARE;
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if (depth < 0)
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depth = 0;
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int16_t d = depth / (UNITS_PER_SQUARE * 2);
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if (d < 0)
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d = 0;
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if (d <= 2)
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c -= d;
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else
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c = 0;
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*/
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Unit depth = pixel.depth - UNITS_PER_SQUARE;
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if (depth < 0)
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depth = 0;
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int intensity = 7 - (depth * 7) / (UNITS_PER_SQUARE * 5);
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if (intensity < 0)
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intensity = 0;
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uint8_t c;
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if (pixel.isWall)
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{
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switch (pixel.hit.direction)
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{
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case 0: c = rgbToIndex(intensity,0,0); break;
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case 1: c = rgbToIndex(0,intensity,0); break;
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case 2: c = rgbToIndex(0,0,intensity / 2); break;
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case 3: c = rgbToIndex(intensity,intensity,0); break;
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default: c = 0; break;
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}
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}
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else
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c = rgbToIndex(intensity,intensity,intensity / 2);
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uint8_t *buf = p.display.screenbuffer;
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buf += pixel.position.x * SUBSAMPLE;
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buf += pixel.position.y * p.display.width;
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for (uint8_t i = 0; i < SUBSAMPLE - 1; ++i)
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*buf++ = c;
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*buf = c;
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//for (uint8_t i = 0; i < SUBSAMPLE; ++i)
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//p.display.drawPixel(pixel.position.x * SUBSAMPLE + i,pixel.position.y,c);
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}
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unsigned short pal[256];
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void draw()
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{
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/*
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uint8_t a = 0;
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for (uint8_t j = 0; j < 88; ++j)
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for (uint8_t i = 0; i < 110; ++i)
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{
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p.display.drawPixel(i,j,a);
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++a;
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}
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return;
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*/
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RayConstraints c;
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c.maxHits = 16;
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c.maxSteps = 16;
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render(player.mCamera,heightFunc,pixelFunc,c);
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/*
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p.display.setCursor(1,1);
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p.display.print(player.mCamera.position.x);
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p.display.print(' ');
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p.display.print(player.mCamera.position.y);
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p.display.print(' ');
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p.display.print(player.mCamera.height);
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p.display.print(' ');
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p.display.print(player.mCamera.direction);
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*/
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}
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int main()
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{
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p.begin();
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/*
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int a,s,r,g,b;
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for(a=0; a<=63; a++){
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s = 0; r = a; g = 63-a; b = 0; pal[a+s] = p.display.RGBto565(r*4,g*4,b*4);
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s = 64; r = 63-a; g = 0; b = a; pal[a+s] = p.display.RGBto565(r*4,g*4,b*4);
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s = 128; r = 0; g = 0; b = 63-a; pal[a+s] = p.display.RGBto565(r*4,g*4,b*4);
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s = 192; r = 0; g = a; b = 0; pal[a+s] = p.display.RGBto565(r*4,g*4,b*4);
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}
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*/
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for (uint8_t r = 0; r < 8; ++r)
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for (uint8_t g = 0; g < 8; ++g)
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for (uint8_t b = 0; b < 4; ++b)
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{
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pal[rgbToIndex(r,g,b)] = p.display.RGBto565(36 * r, 36 * g, 85 * b);
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}
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/*
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for (int i = 0; i < 16; ++i)
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pal[i] = p.display.RGBto565(255-i,255-i,255-i);
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pal[0] = p.display.RGBto565(0,0,0);
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pal[1] = p.display.RGBto565(64,0,0);
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pal[2] = p.display.RGBto565(128,0,0);
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pal[3] = p.display.RGBto565(192,0,0);
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pal[4] = p.display.RGBto565(0,64,0);
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pal[5] = p.display.RGBto565(0,128,0);
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pal[6] = p.display.RGBto565(0,192,0);
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pal[7] = p.display.RGBto565(0,0,64);
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pal[8] = p.display.RGBto565(0,0,128);
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pal[9] = p.display.RGBto565(0,0,192);
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pal[10] = p.display.RGBto565(64,64,0);
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pal[11] = p.display.RGBto565(128,128,0);
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pal[12] = p.display.RGBto565(192,192,0);
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pal[13] = p.display.RGBto565(64,64,64);
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pal[14] = p.display.RGBto565(128,128,128);
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pal[15] = p.display.RGBto565(192,192,192);
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*/
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p.display.load565Palette(&pal[0]); // load a palette the same way as any other palette in any other screen mode
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p.display.persistence = 1;
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p.setFrameRate(60);
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p.display.setFont(fontTiny);
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while (p.isRunning())
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{
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if (p.update())
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{
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draw();
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const int16_t step = max(UNITS_PER_SQUARE / 10,1);
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const int16_t step2 = max(UNITS_PER_SQUARE / 50,1);
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Vector2D d = angleToDirection(player.mCamera.direction);
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d.x = (d.x * step) / UNITS_PER_SQUARE;
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d.y = (d.y * step) / UNITS_PER_SQUARE;
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if (d.x == 0 && d.y == 0)
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{
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d.x = d.x > 0 ? step : -step;
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d.y = d.y > 0 ? step : -step;
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}
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if (p.upBtn())
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{
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player.mCamera.position.x += d.x;
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player.mCamera.position.y += d.y;
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}
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else if (p.downBtn())
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{
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player.mCamera.position.x -= d.x;
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player.mCamera.position.y -= d.y;
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}
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if (p.rightBtn())
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player.mCamera.direction += step2;
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else if (p.leftBtn())
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player.mCamera.direction -= step2;
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if (p.aBtn())
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player.mCamera.height += step;
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else if (p.bBtn())
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player.mCamera.height -= step;
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player.mCamera.height =
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max(heightFunc(player.mCamera.position.x / UNITS_PER_SQUARE,player.mCamera.position.y / UNITS_PER_SQUARE) + UNITS_PER_SQUARE / 2,player.mCamera.height);
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}
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}
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return 0;
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}
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