Okay, figured out input, for real this time

Input/Input.cpp

@@ -77,14 +77,17 @@ void Input::handleMovementKeys(Renderer& ren) {
 	if (ImGui::GetIO().WantCaptureKeyboard)
 		return;
 
+	auto dir = ren.cam.dir();
 	glm::vec3 forward;
 	if (ren.flycam)
-		forward = glm::vec3(glm::sin(ren.cam.theta)*glm::cos(ren.cam.phi), glm::cos(ren.cam.theta), glm::sin(ren.cam.theta)*glm::sin(ren.cam.phi));
+		forward = dir;
 	else
-		forward = glm::vec3(glm::cos(ren.cam.phi), 0.0, glm::sin(ren.cam.phi));
-	const auto right = glm::cross(glm::vec3(0.0, 1.0, 0.0), forward);
-	const auto speed = glfwGetKey(in, GLFW_KEY_LEFT_SHIFT)? 2.0f : 1.0f;
+		forward = glm::normalize(glm::vec3(dir.x, 0.0, dir.z));
 
+	const auto right = glm::normalize(glm::cross(forward, glm::vec3(0.0, 1.0, 0.0)));
+	const auto up = glm::normalize(glm::cross(right, forward));
+
+	const auto speed = glfwGetKey(in, GLFW_KEY_LEFT_SHIFT)? 2.0f : 1.0f;
 
 	if(glfwGetKey(in, GLFW_KEY_UP)) {
 		ren.cam.theta -= 0.02;

Renderer/Renderer.cpp

@@ -324,10 +324,10 @@ void Renderer::draw() {
 	auto sz = win.getDimensions();
 
 	uniform_buffer->upload(UniformData {
-		.view = cam.view(),
-		.viewport = glm::vec2(viewport.width, viewport.y),
+		.cam_pos = cam.pos,
 		.time = time,
-		.focal_length = 2.0,
+		.viewport = glm::vec4(viewport.width, viewport.y, 0.0, 0.0),
+		.cam_dir = cam.dir(),
 	});
 
 	command_buffer->bind(*pipeline);

Renderer/UniformBuffer.hpp

@@ -11,20 +11,19 @@
 
 /* Uniform:
  * 
- * layout (set = 0, binding = 0) uniform Matrices {
- * 		mat4 view;
- *		vec2 viewport;
- *		float time;
- *		float focal_length;
- *	};
- * 
+layout (set = 0, binding = 0) uniform Matrices {
+	vec3 cam_pos;
+	float time;
+	vec4 viewport;
+	vec3 cam_dir;
+}; 
  */
 
 struct UniformData {
-	glm::mat4 view;
-	glm::vec2 viewport;
+	glm::vec3 cam_pos;
 	float time;
-	float focal_length = 2.0;
+	glm::vec4 viewport;
+	glm::vec3 cam_dir;
 };
 
 struct UniformBuffer {

Scene/Camera.hpp

@@ -15,11 +15,11 @@ struct Camera {
 	glm::vec3 pos = glm::vec3(0.0f);
 
 	inline glm::vec3 dir() {
-		return glm::normalize(glm::vec3(
+		return glm::vec3(
 			sin(theta) * cos(phi),
 			cos(theta),
 			sin(theta) * sin(phi)
-		));
+		);
 	}
 
 	inline glm::mat4 view() {

assets/shaders/ray.frag

@@ -1,43 +1,48 @@
 #version 450 core
 
 layout (set = 0, binding = 0) uniform Matrices {
-	mat4 view;
-	vec2 viewport;
+	vec3 cam_pos;
 	float time;
+	vec4 viewport;
+	vec3 cam_dir;
 }; 
 
-layout (location = 0) in vec3 pos;
-layout (location = 1) in vec3 dir;
-
+layout (location = 0) in vec2 pos;
 layout (location = 0) out vec4 fragColor;
 
-
 float sphere(vec3 p, vec3 center, float r) {
-	return length(p) - r;
+	return length(p-center) - r;
 }
 
 float sdf(vec3 pos) {
-	return sphere(pos, vec3(0.0, 0.0, 10.0), 3.0);
+	return sphere(pos, vec3(0.0, 0.0, 0.0), 3.0);
 }
 
-float raycast() {
+float raycast(vec3 dir) {
 	float t = 0.0;
 	for(int i = 0; i < 64; i++) {
-		float dt = sdf(pos + dir * t);
+		float dt = sdf(cam_pos + dir * t);
 		if(dt < 0.0001*t)
-			return t;
+			return float(i) / 64.0;
 		else if(dt > 200.0)
-			return -1;
+			return 1.0;
 		t += dt;
 	}
 
-	return -1;
+	return 1.0;
+}
+
+vec3 raygen() {
+	vec3 forward = cam_dir;
+	vec3 right = normalize(cross(forward, vec3(0.0, 1.0, 0.0)));
+	vec3 up = normalize(cross(right, forward));
+
+	return normalize(pos.x * right + pos.y * up + forward * 2.0);
 }
 
 void main() {
-	float d = raycast();
+	vec3 dir = raygen();
+	float d = raycast(dir);
 
-	vec3 col = vec3(1.0-d*0.075);
-
-	fragColor = vec4(col, 1.0);
+	fragColor = vec4(d);
 }

assets/shaders/ray.vert

@@ -2,21 +2,16 @@
 
 layout (location = 0) in vec2 aCoord;
 
-layout (location = 0) out vec3 pos;
-layout (location = 1) out vec3 dir;
+layout (location = 0) out vec2 pos;
 
 layout (set = 0, binding = 0) uniform Matrices {
-	mat4 view;
-	vec2 viewport;
+	vec3 cam_pos;
 	float time;
-	float focal_length;
+	vec4 viewport;
+	vec3 cam_dir;
 }; 
 
 void main() {
-	vec4 p = view * vec4(aCoord.x * viewport.x/viewport.y, aCoord.y, 0.0, 1.0);
-	pos = p.xyz;
-	p-= view * vec4(0.0, 0.0, -focal_length, 1.0);
-	dir = normalize(p.xyz);
-
 	gl_Position = vec4(aCoord, 0.0, 1.0);
+	pos = vec2(aCoord.x * viewport.x / viewport.y, aCoord.y);
 }