add triangle

src/main.cpp

@@ -2,6 +2,9 @@
 #include "model.h"
 #include "tgaimage.h"
 #include <cmath>
+#include <cstdio>
+#include <cstdlib>
+#include <time.h>
 #include <vector>
 
 using namespace std;
@@ -13,8 +16,6 @@ const TGAColor purple = TGAColor(150, 47, 254, 255);
 const int windowHeight = 800;
 const int windowWidth = 800;
 
-Model *model = NULL;
-
 void line(int x0, int y0, int x1, int y1, TGAImage &image, TGAColor color) {
     bool steep = false;
 
@@ -41,28 +42,32 @@ void line(int x0, int y0, int x1, int y1, TGAImage &image, TGAColor color) {
     }
 }
 
+void triangle(int x1, int y1, int x2, int y2, int x3, int y3, TGAImage &image,
+              TGAColor colour) {
+    line(x1, y1, x2, y2, image, colour);
+    line(x2, y2, x3, y3, image, colour);
+    line(x3, y3, x1, y1, image, colour);
+}
+
 int main(int argc, char **argv) {
-   model = new Model("../obj/head.obj");
-
     TGAImage image(windowWidth, windowHeight, TGAImage::RGB);
-    // Iterate for the number of faces.
-    for (int i = 0; i < model->nfaces(); i++) {
-        // Set each face to be part of the vector.
-        vector<int> face = model->face(i);
 
-        for (int j = 0; j < 3; j++) {
+    // Initialise random.
-            Vec3f v0 = model->vert(face[j]);
+    srand(time(NULL));
-            Vec3f v1 = model->vert(face[(j + 1) % 3]);
+    int x1 = rand() % (windowWidth + 1);
-            int x0 = (v0.x + 1.0) * windowWidth / 2.0;
+    int x2 = rand() % (windowWidth + 1);
-            int y0 = (v0.y + 1.0) * windowHeight / 2.0;
+    int x3 = rand() % (windowWidth + 1);
-            int x1 = (v1.x + 1.0) * windowWidth / 2.0;
+
-            int y1 = (v1.y + 1.0) * windowHeight / 2.0;
+    int y1 = rand() % (windowHeight + 1);
-            line(x0, y0, x1, y1, image, purple);
+    int y2 = rand() % (windowHeight + 1);
-        }
+    int y3 = rand() % (windowHeight + 1);
-    }
+
+    // Random colours.
+    TGAColor colours[] = {white, purple, red};
+
+    triangle(x1, y1, x2, y2, x3, y3, image, colours[(rand() % 3) - 1]);
 
-    image.flip_vertically(); // Origin at bottom left of image.
     image.write_tga_file("output.tga");
-    delete model;
+
     return 0;
 }