Split paddle and ball drawing into separate functions

Signed-off-by: Matt Turner <mattst88@gmail.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/paddle.c b/paddle.c
new file mode 100644
index 0000000..2f6bace
--- /dev/null
+++ b/paddle.c
@@ -0,0 +1,76 @@
+#include "SDL.h"
+#include "SDL_opengl.h"
+
+#include "glpong3d.h"
+#include "paddle.h"
+
+void
+GLPong_PaddleDrawBack(const Paddle_t * paddle) {
+	glLoadIdentity();
+	glBindTexture(GL_TEXTURE_2D, paddle_texture);
+	glEnable(GL_TEXTURE_2D);
+	glColor3f(paddle->r, paddle->g, paddle->b);
+	glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
+	glBegin(GL_QUADS);
+		glTexCoord2f(0.832f, 1.0f); glVertex2f(paddle->w / 2, paddle->h / 2);	/* Upper Right */
+		glTexCoord2f(0.168f, 1.0f); glVertex2f(-paddle->w / 2, paddle->h / 2);	/* Upper Left  */
+		glTexCoord2f(0.168f, 0.0f); glVertex2f(-paddle->w / 2, -paddle->h / 2);	/* Lower Left */
+		glTexCoord2f(0.832f, 0.0f); glVertex2f(paddle->w / 2, -paddle->h / 2);	/* Lower Right */	
+	glEnd();
+	glDisable(GL_TEXTURE_2D);
+
+#ifdef DEBUG
+	glLoadIdentity();
+	glColor3f(1.0f, 0.0f, 0.0f);
+	glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
+	glBegin(GL_POINTS);
+		glVertex3f(0.0f, 0.0f, 0.0f);
+	glEnd();
+#endif
+}
+
+void
+GLPong_PaddleDrawFront(const Paddle_t * paddle) {
+	glLoadIdentity();
+	glBindTexture(GL_TEXTURE_2D, paddle_texture);
+	glEnable(GL_TEXTURE_2D);
+	glColor3f(paddle->r, paddle->g, paddle->b);
+	glTranslatef(paddle->coord.x + (paddle->w / 2), paddle->coord.y + (paddle->h / 2), paddle->coord.z); /* XXX: why does this line differ from above? */
+	glBegin(GL_QUADS);
+		glTexCoord2f(0.168f, 1.0f); glVertex2f(paddle->w / 2, paddle->h / 2);	/* Upper Right */
+		glTexCoord2f(0.832f, 1.0f); glVertex2f(-paddle->w / 2, paddle->h / 2);	/* Upper Left  */
+		glTexCoord2f(0.832f, 0.0f); glVertex2f(-paddle->w / 2, -paddle->h / 2);	/* Lower Left */
+		glTexCoord2f(0.168f, 0.0f); glVertex2f(paddle->w / 2, -paddle->h / 2);	/* Lower Right */
+		glEnd();
+	glDisable(GL_TEXTURE_2D);
+
+#ifdef DEBUG
+	/* Lower Left */
+	glLoadIdentity();
+	glColor3f(1.0f, 0.0f, 0.0f);
+	glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
+	glBegin(GL_POINTS);
+		glVertex3f(0.0f, 0.0f, 0.0f);
+	glEnd();
+
+	/* Lower Right */
+	glLoadIdentity();
+	glTranslatef(paddle->coord.x + paddle->w, paddle->coord.y, paddle->coord.z);
+	glBegin(GL_POINTS);
+		glVertex3f(0.0f, 0.0f, 0.0f);
+	glEnd();
+	
+	/* Top Right */
+	glLoadIdentity();
+	glTranslatef(paddle->coord.x + paddle->w, paddle->coord.y + paddle->h, paddle->coord.z);
+	glBegin(GL_POINTS);
+		glVertex3f(0.0f, 0.0f, 0.0f);
+	glEnd();
+	/* Top Left */
+	glLoadIdentity();
+	glTranslatef(paddle->coord.x, paddle->coord.y + paddle->h, paddle->coord.z);
+	glBegin(GL_POINTS);
+		glVertex3f(0.0f, 0.0f, 0.0f);
+	glEnd();
+#endif
+}