From fee4cbf40b07e17eca676b4687c51313f7cfdd2e Mon Sep 17 00:00:00 2001
From: unknown <paulx161@umn.edu>
Date: Thu, 4 Feb 2021 18:37:17 -0600
Subject: Added example projects from lecture

---
 dev/texture-demo/example.cc | 113 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 dev/texture-demo/example.cc

(limited to 'dev/texture-demo/example.cc')

diff --git a/dev/texture-demo/example.cc b/dev/texture-demo/example.cc
new file mode 100644
index 0000000..b114da5
--- /dev/null
+++ b/dev/texture-demo/example.cc
@@ -0,0 +1,113 @@
+/** CSci-4611 In-Class Example */
+
+#include "example.h"
+
+#include "config.h"
+
+#include <iostream>
+#include <sstream>
+
+
+
+Example::Example() : GraphicsApp(1024,768, "MinGfx Example") {
+    // Define a search path for finding data files (images and shaders)
+    search_path_.push_back(".");
+    search_path_.push_back("./data");
+    search_path_.push_back(DATA_DIR_INSTALL);
+    search_path_.push_back(DATA_DIR_BUILD);
+}
+
+
+Example::~Example() {
+}
+
+
+void Example::UpdateSimulation(double dt)  {
+}
+
+
+void Example::InitOpenGL() {
+    // Set up the camera in a good position to see the entire scene
+    proj_matrix_ = Matrix4::Perspective(60.0f, aspect_ratio(), 0.01f, 100.0f);
+    view_matrix_ = Matrix4::LookAt(Point3(2,1,4), Point3(2,1,0), Vector3(0,1,0));
+    glClearColor(1,1,1,1);
+    
+    
+    // Load the texture we will use
+    texture_.InitFromFile(Platform::FindFile("monalisa.png", search_path_));
+    
+     
+    // Create the mesh by setting the vertex and index arrays directly
+    std::vector<unsigned int> indices;
+    std::vector<Point3> vertices;
+    std::vector<Vector3> normals;
+    std::vector<Point2> tex_coords;
+    
+    // four vertices, each requires 3 floats: (x,y,z)
+    vertices.push_back(Point3(0,0,0));
+    vertices.push_back(Point3(1,0,0));
+    vertices.push_back(Point3(1,1,-1));
+    vertices.push_back(Point3(0,1,-1));
+    
+    // four normals, each requires 3 floats: (x,y,z)
+    normals.push_back(Vector3(0,1,1).ToUnit());
+    normals.push_back(Vector3(0,1,1).ToUnit());
+    normals.push_back(Vector3(0,1,1).ToUnit());
+    normals.push_back(Vector3(0,1,1).ToUnit());
+    
+    // TODO: YOU ADD TEXTURE COORDINATES TO THE MESH
+
+    
+    
+    // indices into the arrays above for the first triangle
+    indices.push_back(0);
+    indices.push_back(1);
+    indices.push_back(2);
+    
+    // indices for the second triangle, note some are reused
+    indices.push_back(0);
+    indices.push_back(2);
+    indices.push_back(3);
+    
+    mesh_.SetVertices(vertices);
+    mesh_.SetNormals(normals);
+    mesh_.SetIndices(indices);
+    
+    // TODO: ALSO REMEMBER TO CALL mesh_.SetTexCoords(..) HERE ONCE YOU HAVE THEM DEFINED.
+    // USE TEXTURE UNIT = 0 SINCE WE HAVE ONLY ONE TEXTURE APPLIED TO THE MESH.
+    
+    mesh_.UpdateGPUMemory();
+    
+}
+
+
+void Example::DrawUsingOpenGL() {
+    // draws a set of axes at the world origin, since we are passing the identity
+    // matrix for the "model" matrix.
+    Matrix4 identity;
+    quick_shapes_.DrawAxes(identity, view_matrix_, proj_matrix_);
+    
+    
+    // We're already learned about how to use transformation matrices to move
+    // an individual model around within the scene.
+    Matrix4 model_matrix = Matrix4::Scale(Vector3(4,4,4));
+
+    
+    // Since we want to texture the mesh we will define a custom material for the
+    // mesh.  The material property we are interested in is called "surface_texture".
+    // We'll set that to point to the Texture2D that we loaded earlier.  You can
+    // also set other properties of the material to define how it reflects light.
+    DefaultShader::MaterialProperties mesh_material;
+    mesh_material.surface_texture = texture_;
+    mesh_material.ambient_reflectance = Color(0.8f, 0.8f, 0.8f);
+    mesh_material.diffuse_reflectance = Color(0.8f, 0.8f, 0.8f);
+    
+    
+    // Use a shader program to draw the mesh with the given model, view, and projection
+    // matrices and with the material properties defined in mesh_material.
+    shader_.Draw(model_matrix, view_matrix_, proj_matrix_, &mesh_, mesh_material);
+}
+
+
+
+
-- 
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