3 files changed, 63 insertions, 2 deletions
diff --git a/examples/line.c b/examples/line.c
new file mode 100644
index 0000000..31724a9
--- /dev/null
+++ b/examples/line.c
@@ -0,0 +1,25 @@
+#include <math.h>
+
+#include "../sponge.h"
+
+#define PI ((float)3.14159265358979323846)
+#define SPEED (0.5f / 360.0f * 2 * PI)
+static float angle = 0.0f;
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+
+void init() {}
+
+void draw_frame(sponge_Texture c) {
+    sponge_clear(c, 0xFF000000);
+    angle += SPEED;
+
+    float x = sinf(angle);
+    float y = cosf(angle);
+    int32_t half = (int32_t)MIN(c.width, c.height) / 2;
+
+    sponge_draw_line(
+        c,
+        half + (int32_t)( x * (float)half), half + (int32_t)( y * (float)half),
+        half + (int32_t)(-x * (float)half), half + (int32_t)(-y * (float)half),
+        0xFFFF00FF);
+}
diff --git a/examples/triangle.c b/examples/triangle.c
index 452dc94..a39ee1b 100644
--- a/examples/triangle.c
+++ b/examples/triangle.c
@@ -1,5 +1,3 @@
-#include <math.h>
-
 #include "../sponge.h"
 
 #define SPEED (4)
diff --git a/examples/triangles.c b/examples/triangles.c
new file mode 100644
index 0000000..f995574
--- /dev/null
+++ b/examples/triangles.c
@@ -0,0 +1,38 @@
+#include "../sponge.h"
+
+#define SPEED_ABS (2)
+#define GRID_SIZE (10)
+
+
+static int32_t offset = 0;
+static int32_t speed = SPEED_ABS;
+
+void init() {}
+
+void draw_frame(sponge_Texture c) {
+    sponge_clear(c, 0xFF000000);
+    offset += speed;
+
+    if (offset > 30) {
+        speed = -SPEED_ABS;
+    } else if (offset < -30) {
+        speed = SPEED_ABS;
+    }
+
+    int32_t offset_x = c.width / GRID_SIZE;
+    int32_t offset_y = c.height / GRID_SIZE;
+
+    for (int i = 0; i < GRID_SIZE; i++) {
+        for (int j = 0; j < GRID_SIZE; j++) {
+            int32_t x = i * offset_x;
+            int32_t y = j * offset_y + offset;
+
+        sponge_draw_triangle_col3(
+            c,
+            x, y + offset_y,
+            x + offset_x, y,
+            x + (offset_x / 4), y + (offset_y / 4),
+            0xFFFF0000, 0xFF00FF00, 0xFF0000FF);
+        }
+    }
+}