GSDP:GAM100/CProcessing/mat3 scale() - Revision history

>Zachary.logsdon at 14:34, 26 June 2019

2019-06-26T14:34:06Z

>Zachary.logsdon at 14:33, 26 June 2019

2019-06-26T14:33:47Z

>Zachary.logsdon: New page: {{GSDP:GAM100API.css}} = mat3_scale() = == Description == Creates a Mat3 scale matrix from an input vector. ==== Parameters ==== mat3_scale(Vec2 scale) ...

2019-06-26T14:31:18Z

New page: {{GSDP:GAM100API.css}} = mat3_scale() = == Description == Creates a Mat3 scale matrix from an input vector. ==== Parameters ==== mat3_scale(Vec2 scale) ...

New page

{{GSDP:GAM100API.css}}
= mat3_scale() =
== Description ==
Creates a [[GSDP:GAM100/CProcessing/Mat3|Mat3]] scale matrix from an input vector.

==== Parameters ====
mat3_scale(Vec2 scale)

*data - (unsigned char *) A pointer to a list of colors in and order like R,G,B,A,R,G,... order
*w - (int) The desired width of the created image.
*h - (int) The desired height of the created image.

== Example ==
<syntaxhighlight lang='c'>
PImage created;

void init()
{
unsigned char colors[] = {255,0,0,255, // Red
255,255,0,255, // Yellow
0,0,255,255, // Blue
0,255,0,255}; // Green

created = createImage(colors, 2, 2);
}

void update()
{
background(color(255, 255, 255, 255));
image(created, canvasWidth/2, canvasHeight/2, 100, 100, 255);
}
</syntaxhighlight>

==== Related ====
* [[GSDP:GAM100/CProcessing |Main Page ]]
* [[GSDP:GAM100/CProcessing/Mat3 |Mat3 ]]
* [[GSDP:GAM100/CProcessing/mat3() |mat3() ]]
* [[GSDP:GAM100/CProcessing/mat3_identity() |mat3_identity() ]]
* [[GSDP:GAM100/CProcessing/mat3_set() |mat3_set() ]]
* [[GSDP:GAM100/CProcessing/mat3_from_vector() |mat3_from_vector() ]]
* [[GSDP:GAM100/CProcessing/mat3_scale() |mat3_scale() ]]
* [[GSDP:GAM100/CProcessing/mat3_translate() |mat3_translate() ]]
* [[GSDP:GAM100/CProcessing/mat3_rotate() |mat3_rotate() ]]
* [[GSDP:GAM100/CProcessing/mat3_rotate_rad() |mat3_rotate_rad() ]]
* [[GSDP:GAM100/CProcessing/mat3_transpose() |mat3_transpose() ]]
* [[GSDP:GAM100/CProcessing/mat3_inverse() |mat3_inverse() ]]
* [[GSDP:GAM100/CProcessing/mat3_concat() |mat3_concat() ]]
* [[GSDP:GAM100/CProcessing/mat3_mult_vec2() |mat3_mult_vec2() ]]

@@ Line 24: / Line 24: @@
    Vec2 position = vec2_set(canvasWidth / 2, canvasHeight / 2);
-   // Create a transform matrix
+   // Create transform matrices
    Mat3 scale = mat3_scale(vec2_set(150, 100));
    Mat3 translate = mat3_translate(position);

@@ Line 2: / Line 2: @@
 = mat3_scale() =
 == Description ==
-Creates a [[GSDP:GAM100/CProcessing/Mat3|Mat3]] scale matrix from an input vector.
+Creates a [[GSDP:GAM100/CProcessing/Mat3|Mat3]] scale matrix from an input [[GSDP:GAM100/CProcessing/Vec2|Vec2]].
 ==== Parameters ====
 mat3_scale(Vec2 scale)
-*data - (unsigned char *) A pointer to a list of colors in and order like R,G,B,A,R,G,... order
+*scale - ([[GSDP:GAM100/CProcessing/Vec2|Vec2]]) A vector containing the x and y scalars to create the matrix from.
 == Example ==
 <syntaxhighlight lang='c'>
 void init()
+{
-   unsigned char colors[] = {255,0,0,255,   // Red
+   rectMode(CENTER);
-,255,0,255, // Yellow
+   noStroke();
+}
 void update()
+{
    background(color(255, 255, 255, 255));
-   image(created, canvasWidth/2, canvasHeight/2, 100, 100, 255);
+}
 </syntaxhighlight>