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A bit more line anim - work in (early) progress.

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This commit is contained in:
jespergravgaard 2018-05-14 10:31:43 +02:00
parent f492173178
commit a7b751a9fd
2 changed files with 61 additions and 5 deletions
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4
src/main/java/dk/camelot64/kickc/passes/Pass0GenerateStatementSequence.java
View File

@ -458,7 +458,7 @@ public class Pass0GenerateStatementSequence extends KickCBaseVisitor<Object> {
}
}
// Add condition i<last+1 or i<last-1
// Add condition i!=last+1 or i!=last-1
VariableIntermediate tmpVar = getCurrentSymbols().addVariableIntermediate();
VariableRef tmpVarRef = tmpVar.getRef();
Statement stmtTmpVar = new StatementAssignment(tmpVarRef, lValue.getRef(), Operators.NEQ, beyondLastVal, new StatementSource(ctx));
@ -611,7 +611,7 @@ public class Pass0GenerateStatementSequence extends KickCBaseVisitor<Object> {
@Override
public RValue visitExprArray(KickCParser.ExprArrayContext ctx) {
RValue array = (LValue) visit(ctx.expr(0));
RValue array = (RValue) visit(ctx.expr(0));
RValue index = (RValue) visit(ctx.expr(1));
return new PointerDereferenceIndexed(array, index);
}

64
src/test/java/dk/camelot64/kickc/test/kc/line-anim.kc
View File

@ -1,7 +1,13 @@
// Animated lines drawn on a single color bitmap
import "c64.kc"
byte* BITMAP = $2000;
byte* SCREEN = $400;
// The number of points
const byte SIZE = 4;
// The delay between pixels
const byte DELAY = 8;
// The coordinates of the lines to animate
word[4] x_start = { 10, 20, 30, 30 };
@ -23,15 +29,65 @@ byte[4] delay;
byte[4] frame;
void main() {
*D011 = VIC_BMM|VIC_DEN|VIC_RSEL|3;
*VIC_MEMORY = (byte)((((word)SCREEN&$3fff)/$40)|(((word)BITMAP&$3fff)/$400));
bitmap_init(BITMAP);
bitmap_clear();
for( byte i=0; i!=8; i+=2) {
init(i);
point_init(i);
bitmap_plot(x_start[i], y_start[i>>1]);
}
while(true) {
(*BORDERCOL)++;
}
}
}
void init(byte point_idx) {
void point_init(byte point_idx) {
x_cur[point_idx] = x_start[point_idx]<<4;
y_cur[point_idx] = ((word)y_start[point_idx>>1])<<4;
delay[point_idx>>1] = DELAY;
}
// Tables for the plotter - initialized by calling bitmap_draw_init();
const byte[256] bitmap_plot_ylo;
const byte[256] bitmap_plot_yhi;
const byte[256] bitmap_plot_bit;
void bitmap_init(byte* bitmap) {
byte bits = $80;
for(byte x : 0..255) {
bitmap_plot_bit[x] = bits;
bits >>= 1;
if(bits==0) {
bits = $80;
}
}
byte* yoffs = bitmap;
for(byte y : 0..255) {
bitmap_plot_ylo[y] = y&$7 | <yoffs;
bitmap_plot_yhi[y] = >yoffs;
if((y&$7)==7) {
yoffs = yoffs + 40*8;
}
}
}
// Clear all graphics on the bitmap
void bitmap_clear() {
byte* bitmap = (byte*) { bitmap_plot_yhi[0], bitmap_plot_ylo[0] };
for( byte y: 0..39 ) {
for( byte x: 0..199 ) {
*bitmap++ = 0;
}
}
}
// Plot a single dot in the bitmap
void bitmap_plot(word x, byte y) {
byte* plotter = (byte*) { bitmap_plot_yhi[y], bitmap_plot_ylo[y] };
plotter += ( x & $fff7 );
*plotter |= bitmap_plot_bit[<x];
}