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-rw-r--r--glpong3d.c68
-rw-r--r--glpong3d.h10
-rw-r--r--paddle.c76
-rw-r--r--paddle.h5
4 files changed, 71 insertions, 88 deletions
diff --git a/glpong3d.c b/glpong3d.c
index dbd67a2..9f78007 100644
--- a/glpong3d.c
+++ b/glpong3d.c
@@ -18,7 +18,7 @@ static int GLPong_HandleEvents(void);
static void GLPong_Draw(void);
static void GLPong_CleanUp(void);
static void GLPong_Move(void);
-static void SDL_GL_GetMouseState(Paddle_t * paddle);
+static void SDL_GL_GetMouseState(GLfloat * x, GLfloat * y);
static GLuint SDL_GL_SurfaceToTexture(SDL_Surface * surface);
int main(int argc, char * argv[]) {
@@ -45,7 +45,6 @@ int main(int argc, char * argv[]) {
break;
}
- SDL_GL_GetMouseState(&GLPong.Front);
GLPong_Move();
/* begin drawing */
@@ -76,24 +75,6 @@ GLPong_Init(GLPong_t * GLPong) {
SDL_Surface * temp = NULL;
GLuint texture;
- GLPong->Front.w = 0.66f;
- GLPong->Front.h = 0.5f;
- GLPong->Front.coord.x = -1.0f;
- GLPong->Front.coord.y = -1.0f;
- GLPong->Front.coord.z = GLPONG_FRONT_Z;
- GLPong->Front.r = 1.0f;
- GLPong->Front.g = 1.0f;
- GLPong->Front.b = 1.0f;
-
- GLPong->Back.w = 0.66f;
- GLPong->Back.h = 0.5f;
- GLPong->Back.coord.x = -(GLPong->Front.w / 2);
- GLPong->Back.coord.y = -(GLPong->Front.h / 2);
- GLPong->Back.coord.z = GLPONG_BACK_Z;
- GLPong->Back.r = 1.0f;
- GLPong->Back.g = 1.0f;
- GLPong->Back.b = 1.0f;
-
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {
fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
return -1;
@@ -135,7 +116,7 @@ GLPong_Init(GLPong_t * GLPong) {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
- gluPerspective(45.0f, GLPONG_WIDTH / GLPONG_HEIGHT, 3.0f, 9.0f);
+ gluPerspective(45.0f, GLPONG_WIDTH / GLPONG_HEIGHT, -GLPONG_FRONT_Z, -GLPONG_BACK_Z);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
@@ -158,10 +139,9 @@ GLPong_Init(GLPong_t * GLPong) {
SDL_FreeSurface(temp);
temp = IMG_Load("paddle-skyos.png");
- paddle_texture = SDL_GL_SurfaceToTexture(temp);
- SDL_FreeSurface(temp);
- temp = IMG_Load("paddle-skyos.png");
- paddle_texture_hit = SDL_GL_SurfaceToTexture(temp);
+ texture = SDL_GL_SurfaceToTexture(temp);
+ GLPong_PaddleInit(&GLPong->front_paddle, GLPONG_FRONT_Z, texture);
+ GLPong_PaddleInit(&GLPong->back_paddle, GLPONG_BACK_Z, texture);
SDL_FreeSurface(temp);
box = glGenLists(1);
@@ -213,6 +193,11 @@ GLPong_HandleEvents(void) {
static void
GLPong_Move(void) {
+ GLfloat x, y;
+
+ SDL_GL_GetMouseState(&x, &y);
+ GLPong_PaddleMove(&GLPong.front_paddle, x, y);
+
GLPong_BallMove();
}
@@ -248,11 +233,11 @@ void GLPong_Draw(void) {
glVertex3f(-1.5f, 1.0f, GLPONG_BACK_Z);
glEnd();
- GLPong_PaddleDrawBack(&GLPong.Back);
+ GLPong_PaddleDraw(&GLPong.back_paddle);
GLPong_BallDraw();
- GLPong_PaddleDrawFront(&GLPong.Front);
+ GLPong_PaddleDraw(&GLPong.front_paddle);
}
#if 0
@@ -332,33 +317,16 @@ SDL_GL_SurfaceToTexture(SDL_Surface * surface) {
}
static void
-SDL_GL_GetMouseState(Paddle_t * paddle) {
- int x, y;
- float temp_x, temp_y;
+SDL_GL_GetMouseState(GLfloat * x, GLfloat * y) {
+ int SDL_x, SDL_y;
SDL_PumpEvents();
- SDL_GetMouseState(&x, &y);
-
- temp_x = ((float) x / GLPONG_WIDTH) * 3.3f - 1.65f;
-
- if (temp_x <= -1.5 + (paddle->w / 2)) {
- temp_x = -1.5 + (paddle->w / 2);
- } else if (temp_x >= 1.5 - (paddle->w / 2)) {
- temp_x = 1.5 - (paddle->w / 2);
- }
-
- temp_y = ((float) y / GLPONG_HEIGHT) * 2.5f - 1.25f;
-
- if (temp_y <= -1.0 + (paddle->h / 2)) {
- temp_y = -1.0 + (paddle->h / 2);
- } else if (temp_y >= 1.0 - (paddle->h / 2)) {
- temp_y = 1.0 - (paddle->h / 2);
- }
+ SDL_GetMouseState(&SDL_x, &SDL_y);
- paddle->coord.x = temp_x - paddle->w / 2;
- paddle->coord.y = -(temp_y + paddle->h / 2);
+ *x = ((float)SDL_x / GLPONG_WIDTH) * 3.3f - 1.65f;
+ *y = ((float)SDL_y / GLPONG_HEIGHT) * 2.25f - 1.25f;
#ifdef DEBUG
- printf("SDL (x, y): (%d, %d)\tGL (x, y, z): (%.3f, %.3f)\n", x, y, paddle->coord.x, paddle->coord.y);
+ printf("SDL (x, y): (%d, %d)\tGL (x, y): (%.3f, %.3f)\n", SDL_x, SDL_y, *x, *y);
#endif
}
diff --git a/glpong3d.h b/glpong3d.h
index 894de0d..13615db 100644
--- a/glpong3d.h
+++ b/glpong3d.h
@@ -25,10 +25,6 @@
#define AMASK 0xff000000
#endif
-GLuint paddle_texture;
-GLuint paddle_texture_hit;
-GLuint box;
-
typedef struct {
GLfloat x, y, z;
} Coord_t;
@@ -40,10 +36,12 @@ typedef struct {
} Paddle_t;
typedef struct {
- Paddle_t Front;
- Paddle_t Back;
+ Paddle_t front_paddle;
+ Paddle_t back_paddle;
} GLPong_t;
GLPong_t GLPong;
+GLuint box;
+
#endif
diff --git a/paddle.c b/paddle.c
index 2f6bace..18b9962 100644
--- a/paddle.c
+++ b/paddle.c
@@ -4,62 +4,38 @@
#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
-}
+static GLuint paddle_texture;
void
-GLPong_PaddleDrawFront(const Paddle_t * paddle) {
+GLPong_PaddleDraw(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? */
+ glTranslatef(paddle->coord.x + (paddle->w / 2), paddle->coord.y + (paddle->h / 2), paddle->coord.z);
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();
+ glEnd();
glDisable(GL_TEXTURE_2D);
#ifdef DEBUG
/* Lower Left */
glLoadIdentity();
- glColor3f(1.0f, 0.0f, 0.0f);
+ glColor3f(0.0f, 0.0f, 1.0f);
glTranslatef(paddle->coord.x, paddle->coord.y, paddle->coord.z);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
-
/* Lower Right */
glLoadIdentity();
+ glColor3f(1.0f, 0.0f, 0.0f);
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);
@@ -72,5 +48,45 @@ GLPong_PaddleDrawFront(const Paddle_t * paddle) {
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 0.0f);
glEnd();
+ /* Center */
+ glLoadIdentity();
+ glColor3f(0.0f, 1.0f, 0.0f);
+ glTranslatef(paddle->coord.x + paddle->w / 2.0f, paddle->coord.y + paddle->h / 2.0f, paddle->coord.z);
+ glBegin(GL_POINTS);
+ glVertex3f(0.0f, 0.0f, 0.0f);
+ glEnd();
#endif
}
+
+void
+GLPong_PaddleInit(Paddle_t * paddle, GLfloat z, GLuint texture) {
+ paddle->w = 0.66f;
+ paddle->h = 0.5f;
+ paddle->coord.x = paddle->w / 2.0f;
+ paddle->coord.y = paddle->h / 2.0f;
+ paddle->coord.z = z;
+ paddle->r = 1.0f;
+ paddle->g = 1.0f;
+ paddle->b = 1.0f;
+
+ paddle_texture = texture;
+}
+
+void
+GLPong_PaddleMove(Paddle_t * paddle, GLfloat x, GLfloat y) {
+ /* clamp paddle to border */
+ if (x <= -1.5f + (paddle->w / 2.0f)) {
+ x = -1.5f + (paddle->w / 2.0f);
+ } else if (x >= 1.5f - (paddle->w / 2.0f)) {
+ x = 1.5f - (paddle->w / 2.0f);
+ }
+
+ if (y <= -1.0f + (paddle->h / 2.0f)) {
+ y = -1.0f + (paddle->h / 2.0f);
+ } else if (y >= 1.0f - (paddle->h / 2.0f)) {
+ y = 1.0f - (paddle->h / 2.0f);
+ }
+
+ paddle->coord.x = x - (paddle->w / 2.0f);
+ paddle->coord.y = -(y + (paddle->h / 2.0f));
+}
diff --git a/paddle.h b/paddle.h
index 5dc4f12..14b7ed8 100644
--- a/paddle.h
+++ b/paddle.h
@@ -6,7 +6,8 @@
#include "glpong3d.h"
-void GLPong_PaddleDrawBack(const Paddle_t * paddle);
-void GLPong_PaddleDrawFront(const Paddle_t * paddle);
+void GLPong_PaddleDraw(const Paddle_t * paddle);
+void GLPong_PaddleInit(Paddle_t * paddle, GLfloat z, GLuint texture);
+void GLPong_PaddleMove(Paddle_t * paddle, GLfloat x, GLfloat y);
#endif /* PADDLE_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 01:55:09 +0000