From 1686a01b6ae7467e71eac247078248de4a3b3423 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Mon, 13 Dec 2021 23:47:30 +0000
Subject: Refactor to start splitting out UI components

---
 ui/manualCameraController.cpp | 67 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 ui/manualCameraController.cpp

(limited to 'ui/manualCameraController.cpp')

diff --git a/ui/manualCameraController.cpp b/ui/manualCameraController.cpp
new file mode 100644
index 0000000..1d3a067
--- /dev/null
+++ b/ui/manualCameraController.cpp
@@ -0,0 +1,67 @@
+#include "manualCameraController.h"
+#include <algorithm>
+#include <cmath>
+#include <gfx/gl/camera.h>
+#include <maths.h>
+
+bool
+ManualCameraController::handleInput(const SDL_Event & e)
+{
+	switch (e.type) {
+		case SDL_KEYDOWN:
+			switch (e.key.keysym.sym) {
+				case SDLK_LCTRL:
+				case SDLK_RCTRL:
+					ctrl = true;
+					return true;
+			}
+			break;
+		case SDL_KEYUP:
+			switch (e.key.keysym.sym) {
+				case SDLK_LCTRL:
+				case SDLK_RCTRL:
+					ctrl = false;
+					return true;
+			}
+			break;
+		case SDL_MOUSEBUTTONDOWN:
+			switch (e.button.button) {
+				case SDL_BUTTON_RIGHT:
+					SDL_SetRelativeMouseMode(SDL_TRUE);
+					mrb = true;
+					return true;
+			}
+			break;
+		case SDL_MOUSEBUTTONUP:
+			switch (e.button.button) {
+				case SDL_BUTTON_RIGHT:
+					SDL_SetRelativeMouseMode(SDL_FALSE);
+					mrb = false;
+					return true;
+			}
+			break;
+		case SDL_MOUSEMOTION:
+			if (mrb) {
+				if (ctrl) {
+					direction -= 0.01F * static_cast<float>(e.motion.xrel);
+					pitch = std::clamp(pitch - 0.01F * static_cast<float>(e.motion.yrel), 0.1F, half_pi);
+				}
+				else {
+					focus += rotate_flat(-direction) * glm::vec2 {-e.motion.xrel, e.motion.yrel};
+				}
+			}
+			return true;
+		case SDL_MOUSEWHEEL:
+			dist = std::clamp(dist - static_cast<float>(e.wheel.y) * 4.F, 5.F, 200.F);
+			break;
+	}
+	return false;
+}
+
+void
+ManualCameraController::updateCamera(Camera * camera) const
+{
+	camera->forward = glm::normalize(sincosf(direction) ^ -sin(pitch));
+	camera->pos = !focus + up * 3.F - (camera->forward * std::pow(dist, 1.3F));
+	camera->up = up;
+}
-- 
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