From 6e27cd596611758bf82f58cff25ad6310bb5ad6e Mon Sep 17 00:00:00 2001
From: sotech117 <michael_foiani@brown.edu>
Date: Wed, 13 Dec 2023 15:36:52 -0500
Subject: add translation of camera

---
 src/camera/camera.cpp       |  6 ++++--
 src/vec4ops/rotations4d.cpp | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/vec4ops/vec4ops.h       |  3 +++
 3 files changed, 50 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/camera/camera.cpp b/src/camera/camera.cpp
index fb63d77..69f2787 100644
--- a/src/camera/camera.cpp
+++ b/src/camera/camera.cpp
@@ -7,12 +7,14 @@
 
 void Camera::updateViewMatrix(SceneCameraData cameraData) {
     m_viewMatrix = Vec4Ops::getViewMatrix4(cameraData.look, cameraData.up, cameraData.over);
-    //  add settings.xy rotation
     m_viewMatrix = glm::rotate(m_viewMatrix, glm::radians(settings.xy), glm::vec3(0.f, 1.f, 0.f));
     m_viewMatrix = glm::rotate(m_viewMatrix, glm::radians(settings.yz), glm::vec3(1.f, 0.f, 0.f));
     m_viewMatrix = glm::rotate(m_viewMatrix, glm::radians(settings.xz), glm::vec3(0.f, 0.f, 1.f));
 
-    m_translationVector = -cameraData.pos;
+
+    // TODO: link sliders here. make them smaller changes since our objects are so small
+    glm::vec4 uiTranslation = glm::vec4(settings.xw, settings.yw, 0.f, settings.zw);
+    m_translationVector = -cameraData.pos + uiTranslation;
 
     m_inverseViewMatrix = glm::inverse(m_viewMatrix);
     m_inverseTranslationVector = -m_translationVector;
diff --git a/src/vec4ops/rotations4d.cpp b/src/vec4ops/rotations4d.cpp
index 37997de..1ff43a7 100644
--- a/src/vec4ops/rotations4d.cpp
+++ b/src/vec4ops/rotations4d.cpp
@@ -72,3 +72,46 @@ glm::mat4 Vec4Ops::getRotationMatrix4ZW(
     result[1][1] = 1;
     return result;
 }
+
+glm::mat4 Vec4Ops::getRotationMatrix4(
+        std::vector<float> anglesRadians)
+{
+    // make the identity
+    glm::mat4 result = glm::mat4(0.f);
+    result[0][0] = 1.f;
+    result[1][1] = 1.f;
+    result[2][2] = 1.f;
+    result[3][3] = 1.f;
+
+    // apply the rotations, starting with the last angle, which corresponds to ZW
+    if (anglesRadians.size() != 6) {
+        throw std::runtime_error("invalid rotation angle array");
+    }
+    for (int i = 5; i >= 0; i--) {
+        switch (i) {
+            case 0:
+                result *= getRotationMatrix4XY(anglesRadians[i]) * result;
+                break;
+            case 1:
+                result *= getRotationMatrix4ZX(anglesRadians[i]) * result;
+                break;
+            case 2:
+                result *= getRotationMatrix4YZ(anglesRadians[i]) * result;
+                break;
+            case 3:
+                result *= getRotationMatrix4XW(anglesRadians[i]) * result;
+                break;
+            case 4:
+                result *= getRotationMatrix4YW(anglesRadians[i]) * result;
+                break;
+            case 5:
+                result *= getRotationMatrix4ZW(anglesRadians[i]) * result;
+                break;
+            default:
+                throw std::runtime_error("invalid rotation matrix");
+        }
+    }
+
+    return result;
+}
+
diff --git a/src/vec4ops/vec4ops.h b/src/vec4ops/vec4ops.h
index 796722a..f4f62f1 100644
--- a/src/vec4ops/vec4ops.h
+++ b/src/vec4ops/vec4ops.h
@@ -6,6 +6,7 @@
 #define PROJECTS_RAY_VEC4OPS_H
 
 #include <glm/glm.hpp>
+#include <vector>
 
 class Vec4Ops {
 public:
@@ -36,6 +37,8 @@ public:
     static glm::vec4 inverseTransformDir4(glm::vec4 dir4, glm::mat4 inverseTransformDirectionMatrix);
 
     static glm::mat4 getViewMatrix4(glm::vec4 upVector, glm::vec4 lookVector, glm::vec4 overVector);
+
+    static glm::mat4 getRotationMatrix4(std::vector<float> anglesRadians);
 };
 
 #endif //PROJECTS_RAY_VEC4OPS_H
-- 
cgit v1.2.3-70-g09d2