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added gradient shaders to line

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Annika
2026-07-08 16:15:48 -07:00
parent 9096b01e19
commit 43c893984f
3 changed files with 77 additions and 17 deletions
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primatives/line.cpp
+73 -16
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@@ -11,7 +11,7 @@ namespace UwU {
class Line {
private:
// plot lines if m <= 1
void lineLow(int16_t ix0, int16_t iy0, int16_t ix1, int16_t iy1, Buffer buffer, Color color) {
void lineLow(int16_t ix0, int16_t iy0, int16_t ix1, int16_t iy1, Buffer buffer, Shader shader) {
int16_t dx = ix1 - ix0;
int16_t dy = iy1 - iy0;
int16_t yi = 1;
@@ -21,20 +21,48 @@ namespace UwU {
}
int16_t d = (2 * dy) - dx;
int16_t y = iy0;
for (int16_t x = ix0; x < ix1; x++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, color);
if (d > 0) {
y += yi;
d += (2 * (dy - dx));
} else {
d += (2 * dy);
if (shader.shaderType == COLOR) {
for (int16_t x = ix0; x < ix1; x++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, shader.c0);
if (d > 0) {
y += yi;
d += (2 * (dy - dx));
} else {
d += (2 * dy);
}
}
return;
} else if (shader.shaderType == HGRADIENT) {
for (int16_t x = ix0; x < ix1; x++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, ShaderMethods::gradient(shader.u0, shader.scale, shader.c0, shader.c1, x));
if (d > 0) {
y += yi;
d += (2 * (dy - dx));
} else {
d += (2 * dy);
}
}
return;
} else if (shader.shaderType == VGRADIENT) {
for (int16_t x = ix0; x < ix1; x++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, ShaderMethods::gradient(shader.v0, shader.scale, shader.c0, shader.c1, y));
if (d > 0) {
y += yi;
d += (2 * (dy - dx));
} else {
d += (2 * dy);
}
}
return;
}
return;
}
// plot lines if m >1
void lineHigh(int16_t ix0, int16_t iy0, int16_t ix1, int16_t iy1, Buffer buffer, Color color) {
void lineHigh(int16_t ix0, int16_t iy0, int16_t ix1, int16_t iy1, Buffer buffer, Shader shader) {
int16_t dx = ix1 - ix0;
int16_t dy = iy1 - iy0;
int16_t xi = 1;
@@ -44,8 +72,10 @@ namespace UwU {
}
int16_t d = (2 * dx) - dy;
int16_t x = ix0;
for (int16_t y = iy0; y < iy1; y++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, color);
if (shader.shaderType == COLOR) {
for (int16_t y = iy0; y < iy1; y++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, shader.c0);
if (d > 0) {
x += xi;
d += (2 * (dx - dy));
@@ -54,6 +84,33 @@ namespace UwU {
}
}
return;
} else if (shader.shaderType == HGRADIENT) {
for (int16_t y = iy0; y < iy1; y++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, ShaderMethods::gradient(shader.u0, shader.scale, shader.c0, shader.c1, x));
if (d > 0) {
x += xi;
d += (2 * (dx - dy));
} else {
d += (2 * dx);
}
}
return;
} else if (shader.shaderType == VGRADIENT) {
for (int16_t y = iy0; y < iy1; y++) {
buffer.drawPixel((uint16_t)x, (uint16_t)y, ShaderMethods::gradient(shader.v0, shader.scale, shader.c0, shader.c1, y));
if (d > 0) {
x += xi;
d += (2 * (dx - dy));
} else {
d += (2 * dx);
}
}
return;
}
return;
}
public:
@@ -70,7 +127,7 @@ namespace UwU {
uint16_t y1;
// Uses Bresenham's line algorithm to draw line of any slope
void draw (Buffer buffer, Color color) {
void draw (Buffer buffer, Shader shader) {
if (x0 > buffer.width || y0 > buffer.height || x1 > buffer.width || y1 > buffer.height) {return;};
int16_t ix0 = x0;
int16_t iy0 = y0;
@@ -78,15 +135,15 @@ namespace UwU {
int16_t iy1 = y1;
if (abs(iy1 - iy0) < abs(ix1 - ix0)) {
if (ix0 > ix1) {
lineLow(ix1, iy1, ix0, iy0, buffer, color);
lineLow(ix1, iy1, ix0, iy0, buffer, shader);
} else {
lineLow(ix0, iy0, ix1, iy1, buffer, color);
lineLow(ix0, iy0, ix1, iy1, buffer, shader);
}
} else {
if (iy0 > iy1) {
lineHigh(ix1, iy1, ix0, iy0, buffer, color);
lineHigh(ix1, iy1, ix0, iy0, buffer, shader);
} else {
lineHigh(ix0, iy0, ix1, iy1, buffer, color);
lineHigh(ix0, iy0, ix1, iy1, buffer, shader);
}
}
return;