From 14131e36eb1412bc2c61680f30bfe9d619c87099 Mon Sep 17 00:00:00 2001 From: Paul Hunkin Date: Thu, 17 Jun 2010 23:04:16 +1200 Subject: [PATCH] Rotating pyramid! --- android/testproject/jni/app-android.c | 274 ++++++++++++++++++++++++++ 1 file changed, 274 insertions(+) diff --git a/android/testproject/jni/app-android.c b/android/testproject/jni/app-android.c index c91867ee4..ae39f3e36 100644 --- a/android/testproject/jni/app-android.c +++ b/android/testproject/jni/app-android.c @@ -7,6 +7,12 @@ #include #include +#include +#include +#include + +#include "importgl.h" + /******************************************************************************* Globals *******************************************************************************/ @@ -22,6 +28,106 @@ static long _getTime(void){ return (long)(now.tv_sec*1000 + now.tv_usec/1000); } +/************************************** + gluperspective implementation +**************************************/ +void gluPerspective(double fovy, double aspect, double zNear, double zFar){ + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + double xmin, xmax, ymin, ymax; + ymax = zNear * tan(fovy * M_PI / 360.0); + ymin = -ymax; + xmin = ymin * aspect; + xmax = ymax * aspect; + glFrustumf(xmin, xmax, ymin, ymax, zNear, zFar); +} + + +/************************************** + glulookat implementation +**************************************/ +void gluLookAt(GLfloat eyex, GLfloat eyey, GLfloat eyez, + GLfloat centerx, GLfloat centery, GLfloat centerz, + GLfloat upx, GLfloat upy, GLfloat upz) +{ + GLfloat m[16]; + GLfloat x[3], y[3], z[3]; + GLfloat mag; + + /* Make rotation matrix */ + + /* Z vector */ + z[0] = eyex - centerx; + z[1] = eyey - centery; + z[2] = eyez - centerz; + mag = sqrt(z[0] * z[0] + z[1] * z[1] + z[2] * z[2]); + if (mag) { /* mpichler, 19950515 */ + z[0] /= mag; + z[1] /= mag; + z[2] /= mag; + } + + /* Y vector */ + y[0] = upx; + y[1] = upy; + y[2] = upz; + + /* X vector = Y cross Z */ + x[0] = y[1] * z[2] - y[2] * z[1]; + x[1] = -y[0] * z[2] + y[2] * z[0]; + x[2] = y[0] * z[1] - y[1] * z[0]; + + /* Recompute Y = Z cross X */ + y[0] = z[1] * x[2] - z[2] * x[1]; + y[1] = -z[0] * x[2] + z[2] * x[0]; + y[2] = z[0] * x[1] - z[1] * x[0]; + + /* mpichler, 19950515 */ + /* cross product gives area of parallelogram, which is < 1.0 for + * non-perpendicular unit-length vectors; so normalize x, y here + */ + + mag = sqrt(x[0] * x[0] + x[1] * x[1] + x[2] * x[2]); + if (mag) { + x[0] /= mag; + x[1] /= mag; + x[2] /= mag; + } + + mag = sqrt(y[0] * y[0] + y[1] * y[1] + y[2] * y[2]); + if (mag) { + y[0] /= mag; + y[1] /= mag; + y[2] /= mag; + } + +#define M(row,col) m[col*4+row] + M(0, 0) = x[0]; + M(0, 1) = x[1]; + M(0, 2) = x[2]; + M(0, 3) = 0.0; + M(1, 0) = y[0]; + M(1, 1) = y[1]; + M(1, 2) = y[2]; + M(1, 3) = 0.0; + M(2, 0) = z[0]; + M(2, 1) = z[1]; + M(2, 2) = z[2]; + M(2, 3) = 0.0; + M(3, 0) = 0.0; + M(3, 1) = 0.0; + M(3, 2) = 0.0; + M(3, 3) = 1.0; +#undef M + glMultMatrixf(m); + + /* Translate Eye to Origin */ + glTranslatef(-eyex, -eyey, -eyez); + +} + + + /******************************************************************************* Initialize the graphics state *******************************************************************************/ @@ -31,6 +137,29 @@ void Java_org_libsdl_android_TestRenderer_nativeInit( JNIEnv* env ) gAppAlive = 1; sDemoStopped = 0; + + __android_log_print(ANDROID_LOG_INFO, "SDL", "Entry point"); + + + /* Enable smooth shading */ + glShadeModel( GL_SMOOTH ); + + /* Set the background black */ + glClearColor( 1.0f, 0.0f, 0.0f, 0.0f ); + + /* Depth buffer setup */ + //glClearDepth( 1.0f ); + + /* Enables Depth Testing */ + glEnable( GL_DEPTH_TEST ); + + /* The Type Of Depth Test To Do */ + glDepthFunc( GL_LEQUAL ); + + /* Really Nice Perspective Calculations */ + glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ); + + } /******************************************************************************* @@ -44,6 +173,35 @@ void Java_org_libsdl_android_TestRenderer_nativeResize( JNIEnv* env, sWindowWidth = w; sWindowHeight = h; __android_log_print(ANDROID_LOG_INFO, "SDL", "resize w=%d h=%d", w, h); + + + + /* Height / width ration */ + GLfloat ratio; + + /* Protect against a divide by zero */ + if ( h == 0 ) + h = 1; + + ratio = ( GLfloat )w / ( GLfloat )h; + + /* Setup our viewport. */ + glViewport( 0, 0, ( GLsizei )w, ( GLsizei )h ); + + /* change to the projection matrix and set our viewing volume. */ + glMatrixMode( GL_PROJECTION ); + glLoadIdentity( ); + + /* Set our perspective */ + gluPerspective( 45.0f, ratio, 0.1f, 100.0f ); + + /* Make sure we're chaning the model view and not the projection */ + glMatrixMode( GL_MODELVIEW ); + + /* Reset The View */ + glLoadIdentity( ); + + } /******************************************************************************* @@ -55,6 +213,8 @@ void Java_org_libsdl_android_TestRenderer_nativeDone( JNIEnv* env ) //shut down the app importGLDeinit(); + + __android_log_print(ANDROID_LOG_INFO, "SDL", "Finalize"); } /******************************************************************************* @@ -65,15 +225,129 @@ void Java_org_libsdl_android_TestGLSurfaceView_nativePause( JNIEnv* env ) sDemoStopped = !sDemoStopped; if (sDemoStopped) { //we paused + __android_log_print(ANDROID_LOG_INFO, "SDL", "Pause"); } else { //we resumed + __android_log_print(ANDROID_LOG_INFO, "SDL", "Resume"); } } /******************************************************************************* Render the next frame *******************************************************************************/ + +const GLbyte vertex []= +{ + 0,1,0, + -1,0,0, + 1,0,0 +}; + +const GLubyte color []= +{ + 255,0,0, + 0,255,0, + 0,0,255 +}; + +int iRot = 0; +int Frames = 0; + + +static void prepareFrame(int width, int height) +{ + glViewport(0, 0, width, height); + + glClearColorx(0,0,0,255); + glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluPerspective(45, (float)width / height, 0.5f, 150); + + glMatrixMode(GL_MODELVIEW); + + glLoadIdentity(); +} + void Java_org_libsdl_android_TestRenderer_nativeRender( JNIEnv* env ) { //TODO: Render here + + prepareFrame(sWindowWidth, sWindowHeight); + + //Camera + gluLookAt(0,0,5, 0,0,0, 0,1,0); + + //Draw a triangle + //glRotatef(iRot, 0, 1, 0); + + glRotatef( Frames % 360, 0.0f, 1.0f, 0.0f ); + + + glEnableClientState (GL_VERTEX_ARRAY); + glEnableClientState (GL_COLOR_ARRAY); + + /* Rotate The Triangle On The Y axis ( NEW ) */ + glRotatef( Frames % 360, 0.0f, 1.0f, 0.0f ); + + /* GLES variant of drawing a triangle */ + const GLfloat triVertices[][9] = { + { /* Front Triangle */ + 0.0f, 1.0f, 0.0f, /* Top Of Triangle */ + -1.0f, -1.0f, 1.0f, /* Left Of Triangle */ + 1.0f, -1.0f, 1.0f /* Right Of Triangle */ + }, { /* Right Triangle */ + 0.0f, 1.0f, 0.0f, /* Top Of Triangle */ + 1.0f, -1.0f, 1.0f, /* Left Of Triangle */ + 1.0f, -1.0f, -1.0f /* Right Of Triangle */ + }, { /* Back Triangle */ + 0.0f, 1.0f, 0.0f, /* Top Of Triangle */ + 1.0f, -1.0f, -1.0f, /* Left Of Triangle */ + -1.0f, -1.0f, -1.0f /* Right Of Triangle */ + }, { /* Left Triangle */ + 0.0f, 1.0f, 0.0f, /* Top Of Triangle */ + -1.0f, -1.0f, -1.0f, /* Left Of Triangle */ + -1.0f, -1.0f, 1.0f /* Right Of Triangle */ + } + }; + + /* unlike GL, GLES does not support RGB. We have to use RGBA instead */ + const GLfloat triColors[][12] = { + { /* Front triangle */ + 1.0f, 0.0f, 0.0f, 1.0f, /* Red */ + 0.0f, 1.0f, 0.0f, 1.0f, /* Green */ + 0.0f, 0.0f, 1.0f, 1.0f /* Blue */ + }, { /* Right triangle */ + 1.0f, 0.0f, 0.0f, 1.0f, /* Red */ + 0.0f, 0.0f, 1.0f, 1.0f, /* Blue */ + 0.0f, 1.0f, 0.0f, 1.0f /* Green */ + }, { /* Back triangle */ + 1.0f, 0.0f, 0.0f, 1.0f, /* Red */ + 0.0f, 1.0f, 0.0f, 1.0f, /* Green */ + 0.0f, 0.0f, 1.0f, 1.0f /* Blue */ + }, { /* Left triangle */ + 1.0f, 0.0f, 0.0f, 1.0f, /* Red */ + 0.0f, 0.0f, 1.0f, 1.0f, /* Blue */ + 0.0f, 1.0f, 0.0f, 1.0f /* Green */ + } + }; + + glEnableClientState(GL_COLOR_ARRAY); + + int tri=0; + + /* Loop through all Triangles */ + for(tri=0;tri