生成射线，并绘制颜色

Scene.cpp

@@ -5,14 +5,14 @@
 #pragma comment(lib, "winmm.lib")
 static int sTotalPixelCount = 0;
 static int sViewportWidth = 0, sViewportHeight = 0;
+static Camera* sCamera = nullptr;
 void Init(int width, int height)
 {
 	sTotalPixelCount = width * height;
 	sViewportWidth = width;
 	sViewportHeight = height;
-	Camera camera(45.0f, float(width) / float(height));
-	camera.LookAt(Vector3(0.0f,0.0f,1.0f), Vector3(0.0f,0.0f,0.0f), Vector3(0.0f,1.0f,0.0f));
-	Ray ray = camera.GetRay(0.5f, 0.5f);
+	sCamera = new Camera(45.0f, float(width) / float(height));
+	sCamera->LookAt(Vector3(0.0f,0.0f,1.0f), Vector3(0.0f,0.0f,0.0f), Vector3(0.0f,1.0f,0.0f));
 }
 
 float GetEscaptedTime() {
@@ -28,7 +28,16 @@ float GetEscaptedTime() {
 void RenderOnePixel(int pixel_index) {
 	int x = pixel_index % sViewportWidth;
 	int y = pixel_index / sViewportWidth;
-	SetColor(x, y, 255, 255, 0, 255);
+	float u = float(x) / sViewportWidth;
+	float v = float(y) / sViewportHeight;
+	Ray ray = sCamera->GetRay(u,v);
+	float rf = ray.mDirection.x > 0.0f ? ray.mDirection.x : -ray.mDirection.x;
+	float gf = ray.mDirection.y > 0.0f ? ray.mDirection.y : -ray.mDirection.y;
+	float bf = ray.mDirection.z > 0.0f ? ray.mDirection.z : -ray.mDirection.z;
+	AByte r = AByte( rf * 255.0f);
+	AByte g = AByte( gf * 255.0f);
+	AByte b = AByte( bf * 255.0f);
+	SetColor(x, y, r, g, b, 255);
 }
 
 void Render()
@@ -39,7 +48,7 @@ void Render()
 		RenderOnePixel(sCurrentRenderPixel);
 		sCurrentRenderPixel++;
 		current_render_time = GetEscaptedTime();
-		if (true || current_render_time > 0.033f) {
+		if (current_render_time > 0.016f) {
 			break;
 		}
 	}