Lots of tweaking. Tenative buggy reflection implimented.

include/Camera.h

@@ -34,6 +34,8 @@ public:
 	sf::Vector3f get_position();
 	sf::Vector2f get_direction();
 
+	void setSpeed(float speed);
+	float getSpeed();
 
 	void recieve_event(VrEventPublisher* p, std::unique_ptr<vr::Event> event) override;
 

include/LightController.h

@@ -8,6 +8,11 @@
 #include "raycaster/Hardware_Caster.h"
 #include "LightHandle.h"
 
+
+// Lighting is a bit tricky as we need to 
+
+
+
 struct LightPrototype {
 	
 	LightPrototype(

include/raycaster/Hardware_Caster.h

@@ -8,6 +8,7 @@
 #include "LightController.h"
 #include "map/Old_Map.h"
 #include "Camera.h"
+#include <GL/glew.h>
 
 #ifdef linux
 #include <CL/cl.h>

kernels/ray_caster_kernel.cl

@@ -1,10 +1,12 @@
 
 float DistanceBetweenPoints(float3 a, float3 b) {
-	return sqrt(pow(a.x - b.x, 2) + pow(a.y - b.y, 2) + pow(a.z - b.z, 2));
+	return fast_distance(a, b);
+	//return sqrt(pow(a.x - b.x, 2) + pow(a.y - b.y, 2) + pow(a.z - b.z, 2));
 }
 
 float Distance(float3 a) {
-	return sqrt(pow(a.x, 2) + pow(a.y, 2) + pow(a.z, 2));
+	return fast_length(a);
+	//return sqrt(pow(a.x, 2) + pow(a.y, 2) + pow(a.z, 2));
 }
 
 // Naive incident ray light
@@ -17,6 +19,8 @@ float4 white_light(float4 input, float3 light, int3 mask) {
 			)
 		) / 32;
 
+	input.w += 0.25f;
+
 	return input;
 
 }
@@ -43,6 +47,10 @@ float4 view_light(float4 in_color, float3 light, float4 light_color, float3 view
 		in_color += pow(specTmp, 8.0f) * light_color * 0.5f / d;
 	}
 
+	if (in_color.w > 1.0){
+		in_color.xyz *= in_color.w;
+	}
+
 	return in_color;
 }
 
@@ -99,6 +107,8 @@ bool cast_light_intersection_ray(
 
 	int3 face_mask = { 0, 0, 0 };
 
+	int length_cutoff = 0;
+
 	// Andrew Woo's raycasting algo
 	do {
 
@@ -123,6 +133,9 @@ bool cast_light_intersection_ray(
 		if (voxel_data != 0)
 			return true;
 
+		if (length_cutoff > 300)
+			return false;
+
 	//} while (any(isless(intersection_t, (float3)(distance_to_light - 1))));
 	} while (intersection_t.x < distance_to_light - 1 ||
 		     intersection_t.y < distance_to_light - 1 ||
@@ -248,6 +261,8 @@ __kernel void raycaster(
         // If we hit a voxel
         int index = voxel.x + (*map_dim).x * (voxel.y + (*map_dim).z * (voxel.z));
         int voxel_data = map[index];
+
+		// Debug, add the light position
 		if (all(voxel == convert_int3((float3)(lights[4], lights[5], lights[6]-3))))
 			voxel_data = 1;
 
@@ -257,72 +272,114 @@ __kernel void raycaster(
 
 			float3 face_position = (float)(0);
 			float2 tile_face_position = (float)(0);
-
+			float3 sign = (float3)(1.0f, 1.0f, 1.0f);
 
 			// First determine the percent of the way the ray is towards the next intersection_t
 			// in relation to the xyz position on the plane
 			if (face_mask.x == -1) {
 
+				sign.x *= -1.0;
 				float z_percent = (intersection_t.z - (intersection_t.x - delta_t.x)) / delta_t.z;
 				float y_percent = (intersection_t.y - (intersection_t.x - delta_t.x)) / delta_t.y;
 
 				// Since we intersected face x, we know that we are at the face (1.0)
-				// Not entirely sure what is causing the 1.0 vs 1.001 rendering bug
+				// I think the 1.001f rendering bug is the ray thinking it's within the voxel
-				face_position = (float3)(1.001f, y_percent, z_percent);
+				// even though it's sitting on the very edge
+				face_position = (float3)(1.0001f, y_percent, z_percent);
 				tile_face_position = (float2)(y_percent, z_percent);
 			}
 			else if (face_mask.y == -1) {
 
+				sign.y *= -1.0;
 				float x_percent = (intersection_t.x - (intersection_t.y - delta_t.y)) / delta_t.x;
 				float z_percent = (intersection_t.z - (intersection_t.y - delta_t.y)) / delta_t.z;
 
-				face_position = (float3)(x_percent, 1.001f, z_percent);
+				face_position = (float3)(x_percent, 1.0001f, z_percent);
 				tile_face_position = (float2)(x_percent, z_percent);
 			}
 
 			else if (face_mask.z == -1) {
 
+				//sign.z *= -1.0;
 				float x_percent = (intersection_t.x - (intersection_t.z - delta_t.z)) / delta_t.x;
 				float y_percent = (intersection_t.y - (intersection_t.z - delta_t.z)) / delta_t.y;
 
-				face_position = (float3)(x_percent, y_percent, 1.001f);
+				face_position = (float3)(x_percent, y_percent, 1.0001f);
 				tile_face_position = (float2)(x_percent, y_percent);
 
 			}
 
-			// We now need to account for the ray wanting to skip the axis in which
-			// it flips its sign
 
-			// TODO: improve this
+
+			// Because the raycasting process is agnostic to the quadrant
+			// it's working in, we need to transpose the sign over to the face positions.
+			// If we don't it will think that it is always working in the (1, 1, 1) quadrant
+			// and will just "copy" the quadrant. This includes shadows as they use the face_position
+			// in order to cast the intersection ray!!
+
+
 
 			if (ray_dir.x > 0) {
-				face_position.x = -face_position.x + 1;
+				face_position.x = -face_position.x + 1.0;
+				//face_position.x = -face_position.x + 1;
 				//tile_face_position.x = -tile_face_position.x + 1.0;
 			}
 			if (ray_dir.x < 0) {
 				//face_position.x = face_position.x + 0;
-				//tile_face_position.x = tile_face_position.x;
+
+
+				// This cures the Z semmetry on the X axis
+				tile_face_position.x = -tile_face_position.x + 1.0;
 			}
 
 			if (ray_dir.y > 0){
+
 				face_position.y =  - face_position.y + 1;
 				//tile_face_position.y = -tile_face_position.y + 1.0;
 			}
 			if (ray_dir.y < 0) {
+
 				//face_position.y = face_position.y + 0;
-				//tile_face_position.y = -tile_face_position.y + 1.0;
+
+				// This cures the Y semmetry on the Z tile faces
+				tile_face_position.x = 1.0 - tile_face_position.x;
+
+				// We run into the Hairy ball problem, so we need to define
+				// a special case for the zmask
+				if (face_mask.z == -1) {
+					tile_face_position.x = 1.0 - tile_face_position.x;
+					tile_face_position.y = 1.0 - tile_face_position.y;
+				}
 			}
 
 			if (ray_dir.z > 0) {
+
 				face_position.z = - face_position.z + 1;
 				//tile_face_position.y = tile_face_position.y + 0.0;
 			}
 
 			if (ray_dir.z < 0) {
+				//sign.z *= -1.0;
+			//	face_position.z = - face_position.z + 1;
 				//face_position.z = face_position.z + 0;
+				tile_face_position.y = -tile_face_position.y + 1.0;
 			}
 
+			if (voxel_data == 6){
+			//	intersection_t = (1, 1, 1) - intersection_t;
+				//intersection_t += delta_t * -convert_float3(isless(intersection_t, 0));
+				float3 ray_pos = (convert_float3(voxel) + face_position);
+				ray_dir *= sign;
+				delta_t = fabs(1.0f / ray_dir);
+				float3 offset = ((ray_pos)-floor(ray_pos)) * convert_float3(voxel_step);
+				intersection_t = delta_t * offset;
 
+				// for negative values, wrap around the delta_t
+				intersection_t += delta_t * -convert_float3(isless(intersection_t, 0));
+				voxel_step = (1, 1, 1);//convert_int3(sign);
+				voxel_step *= (ray_dir > 0) - (ray_dir < 0);
+				continue;
+			}
 			// Now either use the face position to retrieve a texture sample, or
 			// just a plain color for the voxel color
 
@@ -331,17 +388,23 @@ __kernel void raycaster(
 			}
 			else if (voxel_data == 5) {
 				float2 tile_size = convert_float2(*atlas_dim / *tile_dim);
-				voxel_color = read_imagef(texture_atlas, convert_int2(tile_face_position * tile_size) + convert_int2((float2)(3, 0) * tile_size));
+				voxel_color = read_imagef(
+					texture_atlas,
+					convert_int2(tile_face_position * tile_size) +
+					convert_int2((float2)(3, 0) * tile_size)
+				);
+
 				voxel_color.w = 0.0f;
 					//voxel_color = (float4)(0.25, 0.52, 0.30, 0.1);
 			}
 			else if (voxel_data == 1) {
 				voxel_color = (float4)(0.929f, 0.957f, 0.027f, 0.0f);
 			}
-			//else {
+			else {
-			//	voxel_color = (float4)(1.0f, 0.0f, 0.0f, 0.0f);
+				voxel_color = (float4)(1.0f, 0.0f, 0.0f, 0.0f);
-			//}
+			}
-			//
+
+
 
 			if (cast_light_intersection_ray(
 				map,
@@ -353,7 +416,7 @@ __kernel void raycaster(
 			)) {
 
 				// If the light ray intersected an object on the way to the light point
-				float4 ambient_color = white_light(voxel_color, (float3)(256.0f, 256.0f, 256.0f), face_mask);
+				float4 ambient_color = white_light(voxel_color, (float3)(1.0f, 1.0f, 1.0f), face_mask);
 				write_imagef(image, pixel, ambient_color);
 				return;
 			}
@@ -380,7 +443,7 @@ __kernel void raycaster(
 
         dist++;
 
-    } while (dist / 700.0f < 1);
+    } while (dist < 700.0f);
 
 
 	write_imagef(image, pixel, white_light(mix(fog_color, (float4)(0.40, 0.00, 0.40, 0.2), 1.0 - max(dist / 700.0f, (float)0)), (float3)(lights[7], lights[8], lights[9]), face_mask));

src/Camera.cpp

@@ -201,3 +201,11 @@ sf::Vector3f Camera::get_position() {
 sf::Vector2f Camera::get_direction() {
 	return direction;
 }
+
+void Camera::setSpeed(float speed) {
+	default_impulse = speed;;
+}
+
+float Camera::getSpeed() {
+	return default_impulse;
+}

src/main.cpp

@@ -74,6 +74,8 @@ sf::Texture window_texture;
 // - Diffuse fog hard cut off
 // - Infinite light distance, no inverse square
 // - Inconsistent lighting constants. GUI manipulation
+// - Far pointers, attachment lookup and aux buffer, contour lookup & masking
+
 
 int main() {
 
@@ -87,10 +89,6 @@ int main() {
 	// Do nothing, extension wrangling handled by macOS
 	#endif 
 
-	// The socket listener for interacting with the TCP streaming android controller
-	// NetworkInput ni;
-	// ni.listen_for_clients(5000);
-	// ni.stop_listening_for_clients();
 
 	// =============================
 	Map _map(32);
@@ -184,6 +182,9 @@ int main() {
 	float light_pos[4] = { 100, 100, 30 };
 	char screenshot_buf[128]{0};
 
+	bool paused = false;
+	float camera_speed = 1.0;
+
 	while (window.isOpen()) {
 
 		input_handler.consume_sf_events(&window);
@@ -205,14 +206,19 @@ int main() {
 
 		// ==== FPS LOCKED ====
 		
+		window.clear(sf::Color::Black);
+
 		ImGui::SFML::Update(window, sf_delta_clock.restart());
+
+		if (!paused) {
 			camera->update(delta_time);
 			handle->update(delta_time);
 
 			// Run the raycast
 			raycaster->compute();
 			
-		window.clear(sf::Color::Black);
+		}
+
 		raycaster->draw(&window);
 
 		// Give the frame counter the frame time and draw the average frame time
@@ -274,6 +280,10 @@ int main() {
 		if (ImGui::Button("Recompile kernel")) {
 			while (raycaster->debug_quick_recompile() != 0);
 		}
+		if (ImGui::Button("Pause")) {
+			paused = !paused;
+		}
+
 		ImGui::End();
 
 		ImGui::Begin("Lights");
@@ -283,16 +293,15 @@ int main() {
 			handle->set_rgbi(light);
 		}
 
+		if (ImGui::SliderFloat("Camera Speed", &camera_speed, 0, 4)) {
+			camera->setSpeed(camera_speed);
+		}
+
 		if (ImGui::SliderFloat3("Position", light_pos, 0, MAP_X)) {
 			sf::Vector3f light(light_pos[0], light_pos[1], light_pos[2]);
 			handle->set_position(light);
 		}
 
-		// Menu
-
-		
-
-
 		if (ImGui::CollapsingHeader("Window options"))
 		{
 			if (ImGui::TreeNode("Style"))
@@ -301,11 +310,6 @@ int main() {
 				ImGui::TreePop();
 			}
 		}
-		//light_pos[0] = static_cast<float>(sin(elapsed_time) * 100.0f + 300.0f);
-		//light_pos[1] = static_cast<float>(sin(elapsed_time) * 100.0f + 300.0f);
-
-		//sf::Vector3f light(light_pos[0], light_pos[1], light_pos[2]);
-		//handle->set_position(light);
 
 		ImGui::End();
 

src/map/Old_Map.cpp

@@ -101,7 +101,7 @@ void Old_Map::generate_terrain() {
 	int DATA_SIZE = dimensions.x + 1;
 	//an initial seed value for the corners of the data
 	//srand(f_rand());
-	double SEED = rand() % 40 + 40;
+	double SEED = rand() % 10 + 30;
 
 	//seed the data
 	set_sample(0, 0, SEED);
@@ -109,7 +109,7 @@ void Old_Map::generate_terrain() {
 	set_sample(dimensions.x, 0, SEED);
 	set_sample(dimensions.x, dimensions.y, SEED);
 
-	double h = 40.0;//the range (-h -> +h) for the average offset
+	double h = 20.0;//the range (-h -> +h) for the average offset
 					//for the new value in range of h
 					//side length is distance of a single square side
 					//or distance of diagonal in diamond
@@ -188,7 +188,7 @@ void Old_Map::generate_terrain() {
 		for (int y = 100; y < 150; y += 10) {
 			for (int z = 0; z < 10; z += 1) {
 				
-				voxel_data[x + dimensions.x * (y + dimensions.z * z)] = 5;
+				voxel_data[x + dimensions.x * (y + dimensions.z * z)] = 6;
 
 			}
 		}
@@ -222,12 +222,19 @@ void Old_Map::generate_terrain() {
 		}
 	}
 
+	for (int x = 60; x < 65; x++) {
+		for (int y = 60; y < 65; y++) {
+			for (int z = 30; z < 35; z++) {
+				voxel_data[x + dimensions.x * (y + dimensions.z * z)] = 5;
+			}
+		}
+	}
 
 	for (int x = 0; x < dimensions.x; x++) {
 		for (int y = 0; y < dimensions.y; y++) {
 	//		for (int z = 0; z < dimensions.z; z++) {
 				//if (rand() % 1000 < 1)
-					voxel_data[x + dimensions.x * (y + dimensions.z * 1)] = 6;
+					voxel_data[x + dimensions.x * (y + dimensions.z * 1)] = 5;
 	//		}
 		}
 	}

src/raycaster/Hardware_Caster.cpp

@@ -630,7 +630,7 @@ int Hardware_Caster::compile_kernel(std::string kernel_source, bool is_path, std
 
 	// Try and build the program
 	// "-cl-finite-math-only -cl-fast-relaxed-math -cl-unsafe-math-optimizations"
-	error = clBuildProgram(program, 1, &device_id, "-cl-finite-math-only -cl-fast-relaxed-math -cl-unsafe-math-optimizations", NULL, NULL);
+	error = clBuildProgram(program, 1, &device_id, NULL, NULL, NULL);
 
 	// Check to see if it errored out
 	if (vr_assert(error, "clBuildProgram")) {