56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#include "firstperson.h"
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#include <stdio.h>
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#include "maths.h"
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static sf::RenderTexture renderTexture;
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static sf::Vector2f renderTexturePosition;
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static bool init = false;
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static unsigned int width;
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static unsigned int height;
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int firstperson_init(unsigned int _width, unsigned int _height)
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{
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printf("firstperson_init()\n");
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if (!renderTexture.create(_width, _height)) return 0;
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width = _width;
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height = _height;
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init = true;
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return 1;
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}
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void firstperson_update(sf::RenderTarget* renderTarget, Camera* camera)
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{
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const float columnWidth = (float)width/(float)camera->resolution;
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float columnHeight = 0;
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renderTexture.clear();
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for (unsigned int i = 0; i < camera->resolution; i++) {
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float distance = camera->rays[i].distance;
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if (distance > 0.f) columnHeight = 0.5f * (float)height/camera->rays[i].distance;
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float centeredHeight = (float)height/2.f - columnHeight/2.f;
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float distanceScale = distance/10.f;
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distanceScale = (distanceScale > 1.f)? 1.f : distanceScale;
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float brightness = 255.f*(1.f-distanceScale);
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sf::RectangleShape rectangle(sf::Vector2f(columnWidth, columnHeight));
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rectangle.setPosition(sf::Vector2f(i*columnWidth, centeredHeight));
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rectangle.setFillColor(sf::Color(brightness, brightness, brightness));
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renderTexture.draw(rectangle);
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}
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renderTexture.display();
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sf::Sprite sprite(renderTexture.getTexture());
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sprite.setPosition(renderTexturePosition);
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renderTarget->draw(sprite);
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}
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void firstperson_setTexturePosition(float x, float y)
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{
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renderTexturePosition.x = x;
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renderTexturePosition.y = y;
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}
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