donut rodando, falta adicionar sombra

3 files changed, 145 insertions, 0 deletions

diff --git a/donut.c b/donut.c
new file mode 100644
index 0000000..3862056
--- /dev/null
+++ b/donut.c
@@ -0,0 +1,85 @@
+#include "donut.h"
+#include <raylib.h>
+
+//center nao deve ter passado pela funcao map antes
+void draw_circle(point2d center, double radius){
+	double angle = 0;
+	static double static_angle = 0;
+
+	while(angle <= 2*PI){
+		for(double i=0; i<2*PI; i+=0.01){
+			double r = radius;
+
+			//point3d tmpc = {center.x, center.y, 0};
+			//tmpc = rotate_x(tmpc, angle);
+			//center.x = tmpc.x; center.y = tmpc.y;
+
+			point2d aux = {r*cos(i), r*sin(i)};
+			aux.x += center.x; aux.y += center.y;
+
+			point3d tmp3 = {aux.x, aux.y, 0};
+			tmp3 = rotate_y(tmp3, angle);
+			tmp3 = rotate_z(tmp3, static_angle);
+			tmp3 = rotate_x(tmp3, static_angle);
+			aux.x = tmp3.x; aux.y = tmp3.y;
+
+			//point3d tmp = {aux.x, aux.y, 0};
+			//tmp = rotate_y(tmp, angle);
+			//aux.x = tmp.x; aux.y = tmp.y;
+
+//			point3d tmp2 = {aux.x, aux.y, 0};
+//			tmp2 = rotate_x(tmp2, static_angle);
+//			aux.x = tmp2.x; aux.y = tmp2.y;
+
+			aux = map(aux);
+			DrawPixel(aux.x, aux.y, GREEN);
+		}
+		angle += 0.005;
+	}
+	static_angle += 0.05;
+}
+
+point3d rotate_z(point3d p, double a){
+    double Rz[3][3] = {{1, 0, 0}, {0, cos(a), -sin(a)}, {0, sin(a), cos(a)}};
+    point3d rp;
+    rp.x = Rz[0][0]*p.x + Rz[0][1]*p.y + Rz[0][2]*p.z;
+    rp.y = Rz[1][0]*p.x + Rz[1][1]*p.y + Rz[1][2]*p.z;
+    rp.z = Rz[2][0]*p.x + Rz[2][1]*p.y + Rz[2][2]*p.z;
+    return rp;
+}
+
+point3d rotate_y(point3d p, double a){
+    double Ry[3][3] = {{cos(a), 0, sin(a)}, {0, 1, 0}, {-sin(a), 0, cos(a)}};
+    point3d rp;
+    rp.x = Ry[0][0]*p.x + Ry[0][1]*p.y + Ry[0][2]*p.z;
+    rp.y = Ry[1][0]*p.x + Ry[1][1]*p.y + Ry[1][2]*p.z;
+    rp.z = Ry[2][0]*p.x + Ry[2][1]*p.y + Ry[2][2]*p.z;
+    return rp;
+}
+
+point3d rotate_x(point3d p, double a){
+    const double Rx[3][3] = {{cos(a), -sin(a), 0}, {sin(a), cos(a), 0}, {0, 0, 1}};
+    point3d rp;
+    rp.x = Rx[0][0]*p.x + Rx[0][1]*p.y + Rx[0][2]*p.z;
+    rp.y = Rx[1][0]*p.x + Rx[1][1]*p.y + Rx[1][2]*p.z;
+    rp.z = Rx[2][0]*p.x + Rx[2][1]*p.y + Rx[2][2]*p.z;
+    return rp;
+}
+
+point2d map(point2d p){
+    point2d r;
+    r.x = SCREEN_WIDTH/2 * (p.x + 1);
+    r.y = -1*SCREEN_HEIGHT/2 * (p.y + 1) + SCREEN_HEIGHT;
+    return r;
+}
+
+point2d demap(point2d r){
+    point2d p;
+    p.x = r.x * 2 / SCREEN_WIDTH - 1;
+    p.y = -1*(r.y - SCREEN_HEIGHT) * 2 / SCREEN_HEIGHT - 1;
+    return p;
+}
+
+void debug_printp2(point2d p){
+    printf("x: %lf y: %lf\n", p.x, p.y);
+}
diff --git a/donut.h b/donut.h
new file mode 100644
index 0000000..568ae80
--- /dev/null
+++ b/donut.h
@@ -0,0 +1,29 @@
+#ifndef _DONUT
+#define _DONUT
+
+#include <raylib.h>
+#include <stdio.h>
+#include <math.h>
+
+#define SCREEN_WIDTH 640
+#define SCREEN_HEIGHT 640
+
+typedef struct _Point3d{
+    double x, y, z;
+}point3d;
+
+typedef struct _Point2d{
+    double x, y;
+}point2d;
+
+void debug_printp2(point2d p);
+
+point2d map(point2d p);
+point2d demap(point2d p);
+
+void draw_circle(point2d center, double radius);
+point3d rotate_x(point3d p, double a);
+point3d rotate_y(point3d p, double a);
+point3d rotate_z(point3d p, double a);
+
+#endif
\ No newline at end of file
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..cadbf42
--- /dev/null
+++ b/main.c
@@ -0,0 +1,31 @@
+#include <raylib.h>
+#include "donut.h"
+
+int main(){
+    const int screenWidth = SCREEN_WIDTH;
+    const int screenHeight = SCREEN_HEIGHT;
+
+    InitWindow(screenWidth, screenHeight, "donut");
+    SetTargetFPS(60);
+
+    point2d p1 = {0, 0};
+        p1 = map(p1);
+        point2d p2 = (point2d){0.5, 0.5};
+        p2 = map(p2);
+        debug_printp2(p1);
+        debug_printp2(p2);
+    while(!WindowShouldClose()){
+
+        BeginDrawing();
+            ClearBackground(BLACK);
+            DrawText("DONUT", 0, 0, 16, WHITE);
+
+            //draw line 0 0 0.5 0.5
+            DrawLine(p1.x, p1.y, p2.x, p2.y, RED);
+            draw_circle((point2d){0.50, 0.0}, 0.25);
+        EndDrawing();
+    }
+
+    CloseWindow();
+    return 0;
+}
\ No newline at end of file