init: first commit - rendering triangle

main.cpp

@@ -0,0 +1,79 @@
+#include "fastmath.hpp"
+#include "polygon.hpp"
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#define HIGHT 64
+#define WIDTH 64
+
+#define FAA_FAC 2
+#define RHIGHT ((int)(HIGHT * FAA_FAC))
+#define RWIDTH ((int)(WIDTH * FAA_FAC))
+
+char *drawToString(unsigned short *img) {
+    char *textImg = (char *)malloc(200000 * sizeof(char));
+    // strcat(textImg,"\e[1;1H\e[2J"); --clear
+    for (int y = 0; y < HIGHT; y++) {
+        for (int x = 0; x < WIDTH; x++) {
+            // printf("%d,%d\n",x,y);
+            char buff[20];
+            unsigned short val = 0;
+            int my = y * FAA_FAC;
+            int mx = x * FAA_FAC;
+            val += img[my * RWIDTH + mx];
+            val += img[my * RWIDTH + mx + 1];
+            val += img[(my + 1) * RWIDTH + mx];
+            val += img[(my + 1) * RWIDTH + mx + 1];
+            sprintf(buff, "\033[38;5;%dm██\033[0m", 232 + val / 4);
+            strcat(textImg, buff);
+        }
+        strcat(textImg, "\n");
+    }
+    return textImg;
+}
+
+void drawImage(unsigned short *img) {
+    decimal heightPerPix = decimal(1.0) / decimal((float)(HIGHT * FAA_FAC));
+    decimal widthPerPix = decimal(1.0) / decimal((float)(WIDTH * FAA_FAC));
+
+    polygon poly = polygon(vec3(0.9, 0.9, 0.0) * decimal(128.0),
+                           vec3(0.5, 0.1, 0.0) * decimal(128.0),
+                           vec3(0.1, 0.9, 0.0) * decimal(128.0));
+
+    // printf("\n hpp: %f, wpp: %f
+    // \n",TO_FLOAT(heightPerPix),TO_FLOAT(widthPerPix)); calcViewPos(t);
+    for (decimal y = 0; y < decimal((float)(RHIGHT)); y += decimal(1.0)) {
+        for (decimal x = 0; x < decimal((float)(RWIDTH)); x += decimal(1.0)) {
+
+            vec3 p = vec3(x, y, 0.0);
+
+            if (poly.contains(p)) {
+
+                img[(y.i >> SHIFT_AMOUNT) * RWIDTH + (x.i >> SHIFT_AMOUNT)] =
+                    (unsigned short)23; // (((-normal[1]+(1 <<
+                                        // SHIFT_AMOUNT))*14)>>SHIFT_AMOUNT);
+            } else {
+                img[(y.i >> SHIFT_AMOUNT) * RWIDTH + (x.i >> SHIFT_AMOUNT)] =
+                    (unsigned short)0;
+            }
+        }
+    }
+    printf("done writing %d \n", *(img + sizeof(unsigned short) * 32 * 32));
+}
+
+int main() {
+    unsigned short *img =
+        (unsigned short *)malloc(128 * 128 * sizeof(unsigned short));
+    while (true) {
+        drawImage(img);
+        printf("%s", drawToString(img));
+        return 0;
+        // sleep(0.001);
+    }
+    // printf("%s", test);
+    return 0;
+}