From 3e757dbc71682972899a48651710c5d8280c3cee Mon Sep 17 00:00:00 2001
From: Kiet Tran <kietatr@gmail.com>
Date: Mon, 29 Nov 2021 13:36:54 -0600
Subject: Publish A6

---
 dev/a6-harold/sky.cc | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 dev/a6-harold/sky.cc

(limited to 'dev/a6-harold/sky.cc')

diff --git a/dev/a6-harold/sky.cc b/dev/a6-harold/sky.cc
new file mode 100644
index 0000000..0819ebe
--- /dev/null
+++ b/dev/a6-harold/sky.cc
@@ -0,0 +1,74 @@
+/** CSci-4611 Assignment 6: Harold
+ */
+
+#include "sky.h"
+
+
+Sky::Sky() {
+    
+}
+
+
+Sky::~Sky() {
+    
+}
+
+void Sky::Init(ShaderProgram *stroke3d_shaderprog) {
+    stroke3d_shaderprog_ = stroke3d_shaderprog;
+}
+
+
+/// Projects a 2D normalized screen point (e.g., the mouse position in normalized
+/// device coordinates) to a 3D point on the "sky", which is really a huge sphere
+/// (radius = 1500) that the viewer is inside.  This function should always return
+/// true since any screen point can successfully be projected onto the sphere.
+/// sky_point is set to the resulting 3D point.  Note, this function only checks
+/// to see if the ray passing through the screen point intersects the sphere; it
+/// does not check to see if the ray hits the ground or anything else first.
+bool Sky::ScreenPtHitsSky(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
+                        const Point2 &normalized_screen_pt, Point3 *sky_point)
+{
+    // TODO: Stitch together your worksheet implementation of this method
+    return true;
+}
+
+
+
+
+/// Creates a new sky stroke mesh by projecting each vertex of the 2D mesh
+/// onto the sky dome and saving the result as a new 3D mesh.
+void Sky::AddSkyStroke(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
+                       const Mesh &stroke2d_mesh, const Color &stroke_color)
+{
+    // TODO: Create a new SkyStroke and add it to the strokes_ array.
+
+
+
+
+
+
+
+
+
+
+}
+
+
+/// Draws all of the sky strokes
+void Sky::Draw(const Matrix4 &view_matrix, const Matrix4 &proj_matrix) {
+
+    // Precompute matrices needed in the shader
+    Matrix4 model_matrix; // identity
+    Matrix4 modelview_matrix = view_matrix * model_matrix;
+    
+    // Draw sky meshes
+    stroke3d_shaderprog_->UseProgram();
+    stroke3d_shaderprog_->SetUniform("modelViewMatrix", modelview_matrix);
+    stroke3d_shaderprog_->SetUniform("projectionMatrix", proj_matrix);
+    for (int i=0; i<strokes_.size(); i++) {
+        stroke3d_shaderprog_->SetUniform("strokeColor", strokes_[i].color);
+        strokes_[i].mesh.Draw();
+    }
+    stroke3d_shaderprog_->StopProgram();
+}
+
-- 
cgit v1.2.3


From be19aab73bc47ff5d1f8dafd40cbc67a33dc63e9 Mon Sep 17 00:00:00 2001
From: Kiet Tran <tran0563@umn.edu>
Date: Thu, 9 Dec 2021 15:37:16 -0600
Subject: Clarify how to get eye point in Sky::ScreenPtHitsSky

---
 dev/a6-harold/sky.cc | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'dev/a6-harold/sky.cc')

diff --git a/dev/a6-harold/sky.cc b/dev/a6-harold/sky.cc
index 0819ebe..bc08ca0 100644
--- a/dev/a6-harold/sky.cc
+++ b/dev/a6-harold/sky.cc
@@ -28,6 +28,11 @@ void Sky::Init(ShaderProgram *stroke3d_shaderprog) {
 bool Sky::ScreenPtHitsSky(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
                         const Point2 &normalized_screen_pt, Point3 *sky_point)
 {
+    // You will need the eye point, this can be 
+    // determined from the view matrix as follows:
+    Matrix4 camera_matrix = view_matrix.Inverse();
+    Point3 eye = camera_matrix.ColumnToPoint3(3);
+    
     // TODO: Stitch together your worksheet implementation of this method
     return true;
 }
-- 
cgit v1.2.3