34 lines
2.0 KiB
C
34 lines
2.0 KiB
C
#include "../include/camera.h"
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#include "../include/math.h"
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void getCameraXZ(int * x, int * z, int actorX, int actorZ, int angle, int distance) {
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// Using Nic's Costable : https://github.com/grumpycoders/Balau/blob/master/tests/test-Handles.cc#L20-L102
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// https://godbolt.org/z/q6cMcj
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*x = (actorX << 12) + (distance * nsin(angle));
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*z = (actorZ << 12) - (distance * ncos(angle));
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};
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void getCameraXZY(int * x, int * z, int * y, int actorX, int actorZ, int actorY, int angle, int angleX, int distance) {
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// Using Nic's Costable : https://github.com/grumpycoders/Balau/blob/master/tests/test-Handles.cc#L20-L102
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// https://godbolt.org/z/q6cMcj
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*x = (actorX << 12) + (distance * nsin(angle));
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*z = (actorZ << 12) - (distance * ( ( ncos(angle) * ncos(angleX) ) >> 12 ) );
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*y = (actorY << 12) - (distance * nsin(angleX));
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};
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void getCameraZY( int * z, int * y, int actorZ, int actorY, int angleX, int distance) {
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*z = (actorZ << 12) - (distance * ncos(angleX));
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*y = (actorY << 12) - (distance * nsin(angleX));
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};
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// @Will : you might want to use sin/cos to move the camera in a circle but you could do that by moving it along it’s tangent and then clamping the distance
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void applyCamera( CAMERA * cam ) {
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VECTOR vec; // Vector that holds the output values of the following instructions
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RotMatrix_gte(&cam->rot, &cam->mat); // Convert rotation angle in psx units (360° == 4096) to rotation matrix)
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ApplyMatrixLV(&cam->mat, &cam->pos, &vec); // Multiply matrix by vector pos and output to vec
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TransMatrix(&cam->mat, &vec); // Apply transform vector
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SetRotMatrix(&cam->mat); // Set Rotation matrix
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SetTransMatrix(&cam->mat); // Set Transform matrix
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};
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void setCameraPos( CAMERA * camera, VECTOR pos, SVECTOR rot ) {
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camera->pos = pos;
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camera->rot = rot;
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};
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