Implement basic first person view rendering.

firstperson.cpp

@@ -20,16 +20,32 @@ int firstperson_init(unsigned int _width, unsigned int _height)
 	return 1;
 }
 
-void firstperson_update(sf::RenderTarget* renderTarget)
+void firstperson_update(sf::RenderTarget* renderTarget, Camera* camera)
 {
+	const float columnWidth = (float)width/(float)camera->resolution;
+	float columnHeight = 0;
 	renderTexture.clear();
-	sf::CircleShape shape(50);
-	renderTexture.draw(shape);
-	renderTexture.display();
 
+	for (unsigned int i = 0; i < camera->resolution; i++) {
+		float distance = camera->rays[i].distance;
+		if (distance > 0.f) columnHeight = 0.5f * (float)height/camera->rays[i].distance;
+
+		float centeredHeight = (float)height/2.f - columnHeight/2.f;
+		float distanceScale = distance/10.f;
+		distanceScale = (distanceScale > 1.f)? 1.f : distanceScale;
+		float brightness = 255.f*(1.f-distanceScale);
+
+		sf::RectangleShape rectangle(sf::Vector2f(columnWidth, columnHeight));
+		rectangle.setPosition(sf::Vector2f(i*columnWidth, centeredHeight));
+		rectangle.setFillColor(sf::Color(brightness, brightness, brightness));
+		renderTexture.draw(rectangle);
+	}
+
+	renderTexture.display();
 	sf::Sprite sprite(renderTexture.getTexture());
 	sprite.setPosition(renderTexturePosition);
 	renderTarget->draw(sprite);
+
 }
 
 void firstperson_setTexturePosition(float x, float y)