From c83039098c27e9f5afd5409d29e6c1ecb78dc62c Mon Sep 17 00:00:00 2001
From: Marcel Plch <dormouse@plch.xyz>
Date: Sun, 13 Oct 2024 23:54:16 +0200
Subject: [PATCH] Draw the first line

Correct line girth calculation. (sin <-> -sin)
---
 src/cx.c    |  5 ++++-
 src/model.c | 36 ++++++++++++++++++++++++++++++------
 2 files changed, 34 insertions(+), 7 deletions(-)

diff --git a/src/cx.c b/src/cx.c
index 9ac5fe0..599e41e 100644
--- a/src/cx.c
+++ b/src/cx.c
@@ -124,6 +124,7 @@ cx_glinit(GLFWwindow **window) {
 
 int
 cx_glrun(GLFWwindow *window) {
+    Model *model;
     ModelRegistry *mr;
     Model *neural_network_model;
     GLuint VertexArrayID;
@@ -140,7 +141,7 @@ cx_glrun(GLFWwindow *window) {
         for (int i = 0; i < 64; i++) {
             // Load model to render from file
             //Model *model = model_load("../3d_assets/triangle.obj");
-            Model *model = model_circle(0, (GLfloat)1/64);
+            model = model_circle(0, (GLfloat)1/64);
             GLfloat *translation_matrix = matrix_new();
             GLfloat *aspectRatio_matrix = matrix_new();
             aspectRatio_matrix[0] = (GLfloat)9/16;
@@ -158,6 +159,8 @@ cx_glrun(GLFWwindow *window) {
             modelRegistry_register(mr, model);
         }
     }
+    model = model_line(-0.5, 0, 0.5, 0, 0.015);
+    modelRegistry_register(mr, model);
 
 
     // Remainder from cursor experiments, might be useful later
diff --git a/src/model.c b/src/model.c
index 78af7e2..81f8280 100644
--- a/src/model.c
+++ b/src/model.c
@@ -83,10 +83,15 @@ model_applyTransformations(Model *self) {
     // Temporary storage of transformation results
     GLfloat *temp_buffer[2] = {NULL};
 
+
     // BANANA, ROH-TAH-TEH
     temp_buffer[1] = malloc(self->bufsize * 4 * sizeof(GLfloat));
     memcpy(temp_buffer[1], self->object, self->bufsize * 4 * sizeof(GLfloat));
 
+    if (!self->transformation_count) {
+        return temp_buffer[1];
+    }
+
     int i = 0;
     do {
         temp_buffer[i%2] = matrix_transform(temp_buffer[(i+1)%2],
@@ -187,16 +192,17 @@ model_line(float x1, float y1, float x2, float y2, float girth) {
     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)
+    float normal_x = (cos(M_PI/2) * x_diff
+                     -(sin(M_PI/2) * y_diff))
                      / line_length * girth / 2;
 
-    float normal_y = (-sin(M_PI/4) * x_diff
-                     +cos(M_PI/4) * y_diff)
+
+    float normal_y = (sin(M_PI/2) * x_diff
+                     +(cos(M_PI/2) * y_diff))
                      / line_length * girth / 2;
 
+    printf("%f, ",   normal_x);
+    printf("%f,\n",  normal_y);
 
     self = model_new(6);
 
@@ -206,21 +212,39 @@ model_line(float x1, float y1, float x2, float y2, float girth) {
 
     self->object[0] = x1 + normal_x;
     self->object[1] = y1 + normal_y;
+    self->object[3] = 1;
+    printf("%f, ",   self->object[0]);
+    printf("%f,\n",  self->object[1]);
 
     self->object[4] = x1 - normal_x;
     self->object[5] = y1 - normal_y;
+    self->object[7] = 1;
+    printf("%f, ",   self->object[4]);
+    printf("%f,\n",  self->object[5]);
 
     self->object[8] = x2 + normal_x;
     self->object[9] = y2 + normal_y;
+    self->object[11] = 1;
+    printf("%f, ",   self->object[8]);
+    printf("%f,\n",  self->object[9]);
 
     self->object[12] = x1 - normal_x;
     self->object[13] = y1 - normal_y;
+    self->object[15] = 1;
+    printf("%f, ",   self->object[12]);
+    printf("%f,\n",  self->object[13]);
 
     self->object[16] = x2 + normal_x;
     self->object[17] = y2 + normal_y;
+    self->object[19] = 1;
+    printf("%f, ",   self->object[16]);
+    printf("%f,\n",  self->object[17]);
 
     self->object[20] = x2 - normal_x;
     self->object[21] = y2 - normal_y;
+    self->object[23] = 1;
+    printf("%f, ",   self->object[20]);
+    printf("%f,\n",  self->object[21]);
     return self;
 }