public void arc(float x, float y, float radius, float start, float angle, int segments) {
if (segments <= 0) throw new IllegalArgumentException("segments must be > 0.");
if (currType != ShapeType.Filled && currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
checkDirty();
float theta = (2 * 3.1415926f * (angle / 360.0f)) / segments;
float cos = MathUtils.cos(theta);
float sin = MathUtils.sin(theta);
float cx = radius * MathUtils.cos(start * MathUtils.degreesToRadians);
float cy = radius * MathUtils.sin(start * MathUtils.degreesToRadians);
if (currType == ShapeType.Line) {
checkFlush(segments * 2 + 2);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
for (int i = 0; i < segments; i++) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
float temp = cx;
cx = cos * cx - sin * cy;
cy = sin * temp + cos * cy;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
} else {
checkFlush(segments * 3 + 3);
for (int i = 0; i < segments; i++) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
float temp = cx;
cx = cos * cx - sin * cy;
cy = sin * temp + cos * cy;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
float temp = cx;
cx = 0;
cy = 0;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
public void circle(float x, float y, float radius, int segments) {
if (segments <= 0) throw new IllegalArgumentException("segments must be > 0.");
if (currType != ShapeType.Filled && currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
checkDirty();
float angle = 2 * 3.1415926f / segments;
float cos = MathUtils.cos(angle);
float sin = MathUtils.sin(angle);
float cx = radius, cy = 0;
if (currType == ShapeType.Line) {
checkFlush(segments * 2 + 2);
for (int i = 0; i < segments; i++) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
float temp = cx;
cx = cos * cx - sin * cy;
cy = sin * temp + cos * cy;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
// Ensure the last segment is identical to the first.
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
} else {
checkFlush(segments * 3 + 3);
segments--;
for (int i = 0; i < segments; i++) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
float temp = cx;
cx = cos * cx - sin * cy;
cy = sin * temp + cos * cy;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
// Ensure the last segment is identical to the first.
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
float temp = cx;
cx = radius;
cy = 0;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + cx, y + cy, 0);
}
/**
* Draws a polyline in the x/y plane. The vertices must contain at least 2 points (4 floats x,y).
* The {@link ShapeType} passed to begin has to be {@link ShapeType#Line}.
*
* @param vertices
*/
public void polyline(float[] vertices, int offset, int count) {
if (currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Line)");
if (count < 4) throw new IllegalArgumentException("Polylines must contain at least 2 points.");
if (count % 2 != 0)
throw new IllegalArgumentException("Polylines must have an even number of vertices.");
checkDirty();
checkFlush(count);
for (int i = offset, n = offset + count - 2; i < n; i += 2) {
float x1 = vertices[i];
float y1 = vertices[i + 1];
float x2;
float y2;
x2 = vertices[i + 2];
y2 = vertices[i + 3];
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
}
}
public void triangle(float x1, float y1, float x2, float y2, float x3, float y3) {
if (currType != ShapeType.Filled && currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
checkDirty();
checkFlush(6);
if (currType == ShapeType.Line) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x3, y3, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x3, y3, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
} else {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x3, y3, 0);
}
}
/**
* Draws a polyline in the x/y plane. The vertices must contain at least 2 points (4 floats x,y).
* The {@link ShapeType} passed to begin has to be {@link ShapeType#Line}.
*
* @param vertices
*/
public void polyline(float[] vertices) {
if (currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Line)");
if (vertices.length < 4)
throw new IllegalArgumentException("Polylines must contain at least 2 points.");
if (vertices.length % 2 != 0)
throw new IllegalArgumentException("Polylines must have a pair number of vertices.");
final int numFloats = vertices.length;
checkDirty();
checkFlush(numFloats);
for (int i = 0; i < numFloats - 2; i += 2) {
float x1 = vertices[i];
float y1 = vertices[i + 1];
float x2;
float y2;
x2 = vertices[i + 2];
y2 = vertices[i + 3];
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
}
}
/**
* Draws a point. The {@link ShapeType} passed to begin has to be {@link ShapeType#Point}.
*
* @param x
* @param y
* @param z
*/
public void point(float x, float y, float z) {
if (currType != ShapeType.Point)
throw new GdxRuntimeException("Must call begin(ShapeType.Point)");
checkDirty();
checkFlush(1);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z);
}
/**
* Draws a line. The {@link ShapeType} passed to begin has to be {@link ShapeType#Line}. The line
* is drawn with 2 colors interpolated between start & end point.
*
* @param c1 Color at start of the line
* @param c2 Color at end of the line
*/
public void line(float x, float y, float z, float x2, float y2, float z2, Color c1, Color c2) {
if (currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Line)");
checkDirty();
checkFlush(2);
renderer.color(c1.r, c1.g, c1.b, c1.a);
renderer.vertex(x, y, z);
renderer.color(c2.r, c2.g, c2.b, c2.a);
renderer.vertex(x2, y2, z2);
}
/**
* Draws a line in the x/y plane. The {@link ShapeType} passed to begin has to be {@link
* ShapeType#Line}.
*
* @param x
* @param y
* @param x2
* @param y2
*/
public void line(float x, float y, float x2, float y2) {
if (currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Line)");
checkDirty();
checkFlush(2);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
}
/**
* Draws a rectangle in the x/y plane. The x and y coordinate specify the bottom left corner of
* the rectangle. The {@link ShapeType} passed to begin has to be {@link ShapeType#Filled} or
* {@link ShapeType#Line}.
*
* @param col1 The color at (x, y)
* @param col2 The color at (x + width, y)
* @param col3 The color at (x + width, y + height)
* @param col4 The color at (x, y + height)
*/
public void rect(
float x, float y, float width, float height, Color col1, Color col2, Color col3, Color col4) {
if (currType != ShapeType.Filled && currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
checkDirty();
checkFlush(8);
if (currType == ShapeType.Line) {
renderer.color(col1.r, col1.g, col1.b, col1.a);
renderer.vertex(x, y, 0);
renderer.color(col2.r, col2.g, col2.b, col2.a);
renderer.vertex(x + width, y, 0);
renderer.color(col2.r, col2.g, col2.b, col2.a);
renderer.vertex(x + width, y, 0);
renderer.color(col3.r, col3.g, col3.b, col3.a);
renderer.vertex(x + width, y + height, 0);
renderer.color(col3.r, col3.g, col3.b, col3.a);
renderer.vertex(x + width, y + height, 0);
renderer.color(col4.r, col4.g, col4.b, col4.a);
renderer.vertex(x, y + height, 0);
renderer.color(col4.r, col4.g, col4.b, col4.a);
renderer.vertex(x, y + height, 0);
renderer.color(col1.r, col1.g, col1.b, col1.a);
renderer.vertex(x, y, 0);
} else {
renderer.color(col1.r, col1.g, col1.b, col1.a);
renderer.vertex(x, y, 0);
renderer.color(col2.r, col2.g, col2.b, col2.a);
renderer.vertex(x + width, y, 0);
renderer.color(col3.r, col3.g, col3.b, col3.a);
renderer.vertex(x + width, y + height, 0);
renderer.color(col3.r, col3.g, col3.b, col3.a);
renderer.vertex(x + width, y + height, 0);
renderer.color(col4.r, col4.g, col4.b, col4.a);
renderer.vertex(x, y + height, 0);
renderer.color(col1.r, col1.g, col1.b, col1.a);
renderer.vertex(x, y, 0);
}
}
public void ellipse(float x, float y, float width, float height, int segments) {
if (segments <= 0) throw new IllegalArgumentException("segments must be > 0.");
if (currType != ShapeType.Filled && currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
checkDirty();
checkFlush(segments * 3);
float angle = 2 * 3.1415926f / segments;
float cx = x + width / 2, cy = y + height / 2;
if (currType == ShapeType.Line) {
for (int i = 0; i < segments; i++) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(
cx + (width * 0.5f * MathUtils.cos(i * angle)),
cy + (height * 0.5f * MathUtils.sin(i * angle)),
0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(
cx + (width * 0.5f * MathUtils.cos((i + 1) * angle)),
cy + (height * 0.5f * MathUtils.sin((i + 1) * angle)),
0);
}
} else {
for (int i = 0; i < segments; i++) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(
cx + (width * 0.5f * MathUtils.cos(i * angle)),
cy + (height * 0.5f * MathUtils.sin(i * angle)),
0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(cx, cy, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(
cx + (width * 0.5f * MathUtils.cos((i + 1) * angle)),
cy + (height * 0.5f * MathUtils.sin((i + 1) * angle)),
0);
}
}
}
/**
* Draws a box. The x, y and z coordinate specify the bottom left front corner of the rectangle.
* The {@link ShapeType} passed to begin has to be {@link ShapeType#Line}.
*/
public void box(float x, float y, float z, float width, float height, float depth) {
if (currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Line)");
checkDirty();
checkFlush(16);
depth = -depth;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y + height, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y + height, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y + height, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y + height, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y + height, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y + height, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y + height, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y + height, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y + height, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y + height, z);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x + width, y + height, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y, z + depth);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x, y + height, z + depth);
}
/**
* Draws a rectangle in the x/y plane. The x and y coordinate specify the bottom left corner of
* the rectangle. The originX and originY specify the point about which to rotate the rectangle.
* The rotation is in degrees. The {@link ShapeType} passed to begin has to be {@link
* ShapeType#Filled} or {@link ShapeType#Line}.
*
* @param col1 The color at (x, y)
* @param col2 The color at (x + width, y)
* @param col3 The color at (x + width, y + height)
* @param col4 The color at (x, y + height)
*/
public void rect(
float x,
float y,
float width,
float height,
float originX,
float originY,
float rotation,
Color col1,
Color col2,
Color col3,
Color col4) {
if (currType != ShapeType.Filled && currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Filled) or begin(ShapeType.Line)");
checkDirty();
checkFlush(8);
float r = (float) Math.toRadians(rotation);
float c = (float) Math.cos(r);
float s = (float) Math.sin(r);
float x1, y1, x2, y2, x3, y3, x4, y4;
x1 = x + c * (0 - originX) + -s * (0 - originY);
y1 = y + s * (0 - originY) + c * (0 - originY);
x2 = x + c * (width - originX) + -s * (0 - originY);
y2 = y + s * (width - originY) + c * (0 - originY);
x3 = x + c * (width - originX) + -s * (height - originY);
y3 = y + s * (width - originY) + c * (height - originY);
x4 = x + c * (0 - originX) + -s * (height - originY);
y4 = y + s * (0 - originY) + c * (height - originY);
if (currType == ShapeType.Line) {
renderer.color(col1.r, col1.g, col1.b, col1.a);
renderer.vertex(x1, y1, 0);
renderer.color(col2.r, col2.g, col2.b, col2.a);
renderer.vertex(x2, y2, 0);
renderer.color(col2.r, col2.g, col2.b, col2.a);
renderer.vertex(x2, y2, 0);
renderer.color(col3.r, col3.g, col3.b, col3.a);
renderer.vertex(x3, y3, 0);
renderer.color(col3.r, col3.g, col3.b, col3.a);
renderer.vertex(x3, y3, 0);
renderer.color(col4.r, col4.g, col4.b, col4.a);
renderer.vertex(x4, y4, 0);
renderer.color(col4.r, col4.g, col4.b, col4.a);
renderer.vertex(x4, y4, 0);
renderer.color(col1.r, col1.g, col1.b, col1.a);
renderer.vertex(x1, y1, 0);
} else {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x3, y3, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x3, y3, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x4, y4, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x1, y1, 0);
}
}
public void curve(
float x1,
float y1,
float cx1,
float cy1,
float cx2,
float cy2,
float x2,
float y2,
int segments) {
if (currType != ShapeType.Line)
throw new GdxRuntimeException("Must call begin(ShapeType.Line)");
checkDirty();
checkFlush(segments * 2 + 2);
// Algorithm from:
// http://www.antigrain.com/research/bezier_interpolation/index.html#PAGE_BEZIER_INTERPOLATION
float subdiv_step = 1f / segments;
float subdiv_step2 = subdiv_step * subdiv_step;
float subdiv_step3 = subdiv_step * subdiv_step * subdiv_step;
float pre1 = 3 * subdiv_step;
float pre2 = 3 * subdiv_step2;
float pre4 = 6 * subdiv_step2;
float pre5 = 6 * subdiv_step3;
float tmp1x = x1 - cx1 * 2 + cx2;
float tmp1y = y1 - cy1 * 2 + cy2;
float tmp2x = (cx1 - cx2) * 3 - x1 + x2;
float tmp2y = (cy1 - cy2) * 3 - y1 + y2;
float fx = x1;
float fy = y1;
float dfx = (cx1 - x1) * pre1 + tmp1x * pre2 + tmp2x * subdiv_step3;
float dfy = (cy1 - y1) * pre1 + tmp1y * pre2 + tmp2y * subdiv_step3;
float ddfx = tmp1x * pre4 + tmp2x * pre5;
float ddfy = tmp1y * pre4 + tmp2y * pre5;
float dddfx = tmp2x * pre5;
float dddfy = tmp2y * pre5;
while (segments-- > 0) {
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(fx, fy, 0);
fx += dfx;
fy += dfy;
dfx += ddfx;
dfy += ddfy;
ddfx += dddfx;
ddfy += dddfy;
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(fx, fy, 0);
}
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(fx, fy, 0);
renderer.color(color.r, color.g, color.b, color.a);
renderer.vertex(x2, y2, 0);
}