From 1f4565c0a5075880bc926ad2f0c8a4250a72e8de Mon Sep 17 00:00:00 2001
From: Marcel Plch <dormouse@plch.xyz>
Date: Sun, 13 Oct 2024 22:43:43 +0200
Subject: [PATCH] Implement line meshes

---
 include/model.h |  1 +
 src/cx.c        |  9 +++++----
 src/model.c     | 44 +++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/include/model.h b/include/model.h
index cf1fae3..7ca91ac 100644
--- a/include/model.h
+++ b/include/model.h
@@ -28,6 +28,7 @@ void model_colorBlue(Model *);
 void model_colorWhite(Model *);
 void model_colorBlack(Model *);
 Model *model_circle(int, GLfloat);
+Model *model_line(GLfloat, GLfloat, GLfloat, GLfloat, GLfloat);
 
 #endif
 
diff --git a/src/cx.c b/src/cx.c
index d3fc044..9ac5fe0 100644
--- a/src/cx.c
+++ b/src/cx.c
@@ -124,16 +124,17 @@ cx_glinit(GLFWwindow **window) {
 
 int
 cx_glrun(GLFWwindow *window) {
+    ModelRegistry *mr;
+    Model *neural_network_model;
     GLuint VertexArrayID;
     GLuint programID;
     if (cx_loadShaders(&VertexArrayID, &programID)) {
         return -1;
     }
 
-    // Establish a model registry
-    ModelRegistry *mr;
-    mr = modelRegistry_new();
 
+    // Establish a model registry
+    mr = modelRegistry_new();
     // Fill the model registry with mesh models
     for (int j = 0; j < 8; j++) {
         for (int i = 0; i < 64; i++) {
@@ -147,7 +148,7 @@ cx_glrun(GLFWwindow *window) {
             translation_matrix[3] = (((GLfloat)-1*16/9)*.90)
                                     + ((GLfloat)1/32 * i * (((GLfloat)16/9))*.90);
 
-            translation_matrix[7] = .90 + ((GLfloat)1/8 * j *.90);
+            translation_matrix[7] = .90 - ((GLfloat)1/4 * j *.90);
 
             model->transformations[0] = translation_matrix;
             model->transformations[1] = aspectRatio_matrix;
diff --git a/src/model.c b/src/model.c
index 9acb9fd..78af7e2 100644
--- a/src/model.c
+++ b/src/model.c
@@ -179,11 +179,49 @@ model_circle(int detail, GLfloat scale) {
 }
 
 Model *
-model_line(Model *self, int detail) {
+model_line(float x1, float y1, float x2, float y2, float girth) {
+    Model *self;
+    float x_diff, y_diff, line_length;
+
+    x_diff = x2 - x1;
+    y_diff = y2 - y1;
+    line_length = sqrt((x_diff*x_diff) + (y_diff*y_diff));
+
+    printf("%f, ", girth);
+    printf("%f,\n", -girth);
+    float normal_x = (cos(M_PI/4) * x_diff
+                     +sin(M_PI/4) * y_diff)
+                     / line_length * girth / 2;
+
+    float normal_y = (-sin(M_PI/4) * x_diff
+                     +cos(M_PI/4) * y_diff)
+                     / line_length * girth / 2;
+
+
+    self = model_new(6);
+
     if (self == NULL) {
-        self = model_new(6);
+        return NULL;
     }
-    return 0;
+
+    self->object[0] = x1 + normal_x;
+    self->object[1] = y1 + normal_y;
+
+    self->object[4] = x1 - normal_x;
+    self->object[5] = y1 - normal_y;
+
+    self->object[8] = x2 + normal_x;
+    self->object[9] = y2 + normal_y;
+
+    self->object[12] = x1 - normal_x;
+    self->object[13] = y1 - normal_y;
+
+    self->object[16] = x2 + normal_x;
+    self->object[17] = y2 + normal_y;
+
+    self->object[20] = x2 - normal_x;
+    self->object[21] = y2 - normal_y;
+    return self;
 }
 
 Model *