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/*
* Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
* Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "gfx.h"
#include <string.h>
#define FRAME_DELAY 100 /* The interframe delay in milliseconds */
// Our shape definition
static const gPoint shape[] = {
{ 10, 10 },
{ 10, 15 },
{ 17, 17 },
{ 20, 5 },
{ 10, 0 },
{ 3, -10},
{ -7, -15},
{ -15, -15},
{ -13, -12 },
{ -8, 0 },
};
#define NUM_POINTS (sizeof(shape)/sizeof(shape[0]))
// Where we put our calculated points
static gPoint result[NUM_POINTS];
static gPoint oldresult[NUM_POINTS];
// Make fixed point and floating point options look pretty similar
#if GMISC_NEED_MATRIXFLOAT2D
static MatrixFloat2D m1, m2;
typedef float mtype;
#define FP2MTYPE(f) (f)
#define INT2MTYPE(i) (i)
#elif GMISC_NEED_MATRIXFIXED2D
static MatrixFixed2D m1, m2;
typedef fixed mtype;
#define FP2MTYPE(f) FP2FIXED(f)
#define INT2MTYPE(i) FIXED(i)
#else
#error "Either GMISC_NEED_MATRIXFLOAT2D or GMISC_NEED_MATRIXFIXED2D must be defined for this demo"
#endif
int main(void) {
coord_t width, height;
mtype scalex, scaley;
mtype scaleincx, scaleincy;
mtype translatex, translatey;
mtype transincx, transincy;
mtype transmaxx, transmaxy;
mtype transminx, transminy;
int angle;
int angleinc;
// Initialize and clear the display
gfxInit();
gdispClear(GFX_WHITE);
// Get the screen size
width = gdispGetWidth();
height = gdispGetHeight();
// Initial position, rotation and scale
scalex = scaley = FP2MTYPE(1.0);
translatex = INT2MTYPE(width/2);
translatey = INT2MTYPE(height/2);
angle = 0;
// How much to change the position, rotation and scale each cycle
scaleincx = scaleincy = FP2MTYPE(0.5);
transincx = INT2MTYPE(2);
transincy = INT2MTYPE(-2);
angleinc = 2;
transmaxx = INT2MTYPE(width - 15);
transminx = INT2MTYPE(15);
transmaxy = INT2MTYPE(height - 15);
transminy = INT2MTYPE(15);
while(1) {
// Move to the new location, rotation and scale
scalex += scaleincx;
scaley += scaleincy;
angle += angleinc;
if (angle >= 360)
angle -= 360;
translatex += transincx;
translatey += transincy;
// Adjust our speed etc
if (scalex > FP2MTYPE(10.0)) scaleincx = FP2MTYPE(-0.3);
else if (scalex < FP2MTYPE(1.0)) scaleincx = FP2MTYPE(0.5);
if (scaley > FP2MTYPE(7.0)) scaleincy = FP2MTYPE(-0.25);
else if (scaley < FP2MTYPE(1.0)) scaleincy = FP2MTYPE(0.3);
if (translatex > transmaxx || translatex < transminx) transincx = -transincx;
if (translatey > transmaxy || translatey < transminy) transincy = -transincy;
// Build a matrix of all the operations we want to do and then apply it to all the shape points
#if GMISC_NEED_MATRIXFLOAT2D
gmiscMatrixFloat2DApplyScale(&m1, 0, scalex, scaley);
gmiscMatrixFloat2DApplyRotation(&m2, &m1, angle);
gmiscMatrixFloat2DApplyTranslation(&m1, &m2, translatex, translatey);
gmiscMatrixFloat2DApplyToPoints(result, shape, &m1, NUM_POINTS);
#else
gmiscMatrixFixed2DApplyScale(&m1, 0, scalex, scaley);
gmiscMatrixFixed2DApplyRotation(&m2, &m1, angle);
gmiscMatrixFixed2DApplyTranslation(&m1, &m2, translatex, translatey);
gmiscMatrixFixed2DApplyToPoints(result, shape, &m1, NUM_POINTS);
#endif
// Clear the old shape
gdispDrawPoly(0, 0, oldresult, NUM_POINTS, GFX_WHITE);
gdispFillConvexPoly(0, 0, oldresult, NUM_POINTS, GFX_WHITE);
// Play the new shape position
// NOTE: Because our shape is not a true convex polygon, we get some frames
// where the line outline and the filled shape don't match. This is
// expected due to the shapes non-convex nature and was left in the
// demo to demonstrate this exact point.
gdispFillConvexPoly(0, 0, result, NUM_POINTS, GFX_RED);
gdispDrawPoly(0, 0, result, NUM_POINTS, GFX_BLUE);
// Make sure the display is updated
gdispFlush();
// Save the results so we can clear them next cycle
memcpy(oldresult, result, sizeof(result));
// Delay for a while
gfxSleepMilliseconds(FRAME_DELAY);
}
}
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