Sprite: add rotation and origin

2 files changed, 20 insertions, 6 deletions

diff --git a/src/gl.c b/src/gl.c
index 5999b80..4d8fb58 100644
--- a/src/gl.c
+++ b/src/gl.c
@@ -57,6 +57,7 @@ int mgl_gl_load(mgl_gl *self) {
         { &self->glLoadIdentity, "glLoadIdentity" },
         { &self->glLoadMatrixf, "glLoadMatrixf" },
         { &self->glTranslatef, "glTranslatef" },
+        { &self->glRotatef, "glRotatef" },
         { &self->glGenBuffers, "glGenBuffers" },
         { &self->glBindBuffer, "glBindBuffer" },
         { &self->glDeleteBuffers, "glDeleteBuffers" },
diff --git a/src/graphics/sprite.c b/src/graphics/sprite.c
index 2aecdd1..df3e902 100644
--- a/src/graphics/sprite.c
+++ b/src/graphics/sprite.c
@@ -2,11 +2,13 @@
 #include "../../include/mgl/graphics/texture.h"
 #include "../../include/mgl/mgl.h"
 
-void mgl_sprite_init(mgl_sprite *self, mgl_texture *texture, float x, float y) {
+void mgl_sprite_init(mgl_sprite *self, mgl_texture *texture) {
     self->texture = texture;
     self->color = (mgl_color){ 255, 255, 255, 255 };
-    self->position = (mgl_vec2f){ x, y };
+    self->position = (mgl_vec2f){ 0.0f, 0.0f };
     self->scale = (mgl_vec2f){ 1.0f, 1.0f };
+    self->origin = (mgl_vec2f){ 0.0f, 0.0f };
+    self->rotation = 0.0f;
 }
 
 void mgl_sprite_set_texture(mgl_sprite *self, mgl_texture *texture) {
@@ -21,6 +23,14 @@ void mgl_sprite_set_color(mgl_sprite *self, mgl_color color) {
     self->color = color;
 }
 
+void mgl_sprite_set_rotation(mgl_sprite *self, float degrees) {
+    self->rotation = degrees;
+}
+
+void mgl_sprite_set_origin(mgl_sprite *self, mgl_vec2f origin) {
+    self->origin = origin;
+}
+
 /* TODO: Cache texture bind to not bind texture if its already bound and do not bind texture 0 */
 void mgl_sprite_draw(mgl_context *context, mgl_sprite *sprite) {
     if(!sprite->texture)
@@ -35,18 +45,21 @@ void mgl_sprite_draw(mgl_context *context, mgl_sprite *sprite) {
 
     context->gl.glColor4ub(sprite->color.r, sprite->color.g, sprite->color.b, sprite->color.a);
     mgl_texture_use(sprite->texture);
+    context->gl.glTranslatef(sprite->position.x, sprite->position.y, 0.0f);
+    context->gl.glRotatef(sprite->rotation, 0.0f, 0.0f, 1.0f);
     context->gl.glBegin(GL_QUADS);
         context->gl.glTexCoord2f(0.0f, 0.0f);
-        context->gl.glVertex3f(sprite->position.x, sprite->position.y, 0.0f);
+        context->gl.glVertex3f(-sprite->origin.x * sprite->scale.x, -sprite->origin.y * sprite->scale.y, 0.0f);
 
         context->gl.glTexCoord2f(texture_right, 0.0f);
-        context->gl.glVertex3f(sprite->position.x + sprite->texture->width * sprite->scale.x, sprite->position.y, 0.0f);
+        context->gl.glVertex3f((sprite->texture->width - sprite->origin.x) * sprite->scale.x, -sprite->origin.y * sprite->scale.y, 0.0f);
 
         context->gl.glTexCoord2f(texture_right, texture_bottom);
-        context->gl.glVertex3f(sprite->position.x + sprite->texture->width * sprite->scale.x, sprite->position.y + sprite->texture->height * sprite->scale.y, 0.0f);
+        context->gl.glVertex3f((sprite->texture->width - sprite->origin.x) * sprite->scale.x, (sprite->texture->height - sprite->origin.y) * sprite->scale.y, 0.0f);
 
         context->gl.glTexCoord2f(0.0f, texture_bottom);
-        context->gl.glVertex3f(sprite->position.x, sprite->position.y + sprite->texture->height * sprite->scale.y, 0.0f);
+        context->gl.glVertex3f(-sprite->origin.x * sprite->scale.x, (sprite->texture->height - sprite->origin.y) * sprite->scale.y, 0.0f);
     context->gl.glEnd();
     mgl_texture_use(NULL);
+    context->gl.glLoadIdentity(); /* TODO: Remove, but what about glRotatef above */
 }