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