Zack Buhman
b99722a6df
This rearranges scene.cpp to a file organization that more closely follows which code is responsible for what area of (hardware) initialization. All TA and CORE register accesses now use the new ta_bits.h and core_bits.h, respectively.
57 lines
1.0 KiB
C++
57 lines
1.0 KiB
C++
#include <cstdint>
|
|
|
|
#include "holly/ta_parameter.h"
|
|
|
|
/*
|
|
0,-.5
|
|
|
|
|
---
|
|
-0.5,0.5 | 0.5,0.5
|
|
*/
|
|
|
|
float scene_triangle[3][3] = {
|
|
{ 0.f, -0.5f, 1/10.f},
|
|
{ 0.5f, 0.5f, 1/10.f},
|
|
{ -0.5f, 0.5f, 1/10.f},
|
|
};
|
|
|
|
static float theta = 0;
|
|
constexpr float one_degree = 0.01745329f;
|
|
|
|
uint32_t scene_transform(volatile uint32_t * scene)
|
|
{
|
|
uint32_t ix = 0;
|
|
|
|
triangle(&scene[(32 * ix) / 4]);
|
|
ix++;
|
|
|
|
for (int i = 0; i < 3; i++) {
|
|
bool end_of_strip = i == 2;
|
|
|
|
float x = scene_triangle[i][0];
|
|
float y = scene_triangle[i][1];
|
|
|
|
x = x * __builtin_cosf(theta) - y * __builtin_sinf(theta);
|
|
y = x * __builtin_sinf(theta) + y * __builtin_cosf(theta);
|
|
x *= 240.f;
|
|
y *= 240.f;
|
|
x += 320.f;
|
|
y += 240.f;
|
|
|
|
vertex(&scene[(32 * ix) / 4],
|
|
x, // x
|
|
y, // y
|
|
scene_triangle[i][2], // z
|
|
0xffff00ff, // base_color
|
|
end_of_strip);
|
|
ix++;
|
|
}
|
|
|
|
end_of_list(&scene[(32 * ix) / 4]);
|
|
ix++;
|
|
|
|
theta += one_degree;
|
|
|
|
return ix;
|
|
}
|